ID CVE-2014-6055
Summary Multiple stack-based buffer overflows in the File Transfer feature in rfbserver.c in LibVNCServer 0.9.9 and earlier allow remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a (1) long file or (2) directory name or the (3) FileTime attribute in a rfbFileTransferOffer message.
References
Vulnerable Configurations
  • Fedora 21
    cpe:2.3:o:fedoraproject:fedora:21
  • Fedora 20
    cpe:2.3:o:fedoraproject:fedora:20
  • Debian Linux 7.0
    cpe:2.3:o:debian:debian_linux:7.0
  • Red Hat Enterprise Linux Server Advanced mission critical Update Support (AUS) 6.5
    cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:6.5.z
    cpe:2.3:o:redhat:enterprise_linux_server_eus:6.5.z
  • cpe:2.3:a:libvncserver:libvncserver:0.9.9
    cpe:2.3:a:libvncserver:libvncserver:0.9.9
CVSS
Base: 6.5 (as of 02-09-2016 - 19:58)
Impact:
Exploitability:
CWE CWE-119
CAPEC
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
Access
VectorComplexityAuthentication
NETWORK LOW SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL PARTIAL
nessus via4
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2015-0113.NASL
    description Updated libvncserver packages that fix two security issues are now available for Red Hat Enterprise Linux 6.5 Extended Update Support. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 81143
    published 2015-02-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=81143
    title RHEL 6 : libvncserver (RHSA-2015:0113)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2014-1827.NASL
    description From Red Hat Security Advisory 2014:1827 : Updated kdenetwork packages that fix three security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kdenetwork packages contain networking applications for the K Desktop Environment (KDE). Krfb Desktop Sharing, which is a part of the kdenetwork package, is a server application that allows session sharing between users. Krfb uses the LibVNCServer library. A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. Note: Prior to this update, the kdenetwork packages used an embedded copy of the LibVNCServer library. With this update, the kdenetwork packages have been modified to use the system LibVNCServer packages. Therefore, the update provided by RHSA-2014:1826 must be installed to fully address the issues in krfb described above. All kdenetwork users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running instances of the krfb server must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 79200
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79200
    title Oracle Linux 7 : kdenetwork (ELSA-2014-1827)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-11685.NASL
    description Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-05
    plugin id 78000
    published 2014-10-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78000
    title Fedora 21 : libvncserver-0.9.10-0.6.20140718git9453be42.fc21 (2014-11685)
  • NASL family Mandriva Local Security Checks
    NASL id MANDRIVA_MDVSA-2015-146.NASL
    description Updated libvncserver packages fix security vulnerabilities : An integer overflow in liblzo before 2.07 allows attackers to cause a denial of service or possibly code execution in applications using performing LZO decompression on a compressed payload from the attacker (CVE-2014-4607). The libvncserver library is built with a bundled copy of minilzo, which is a part of liblzo containing the vulnerable code. A malicious VNC server can trigger incorrect memory management handling by advertising a large screen size parameter to the VNC client. This would result in multiple memory corruptions and could allow remote code execution on the VNC client (CVE-2014-6051, CVE-2014-6052). A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054). A malicious VNC client can trigger multiple stack-based buffer overflows by passing a long file and directory names and/or attributes (FileTime) when using the file transfer message feature (CVE-2014-6055).
    last seen 2019-02-21
    modified 2018-07-19
    plugin id 82399
    published 2015-03-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=82399
    title Mandriva Linux Security Advisory : libvncserver (MDVSA-2015:146)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_FB25333D442F11E498F35453ED2E2B49.NASL
    description Martin Sandsmark reports : krfb 4.14 [and earlier] embeds libvncserver which has had several security issues. Several remotely exploitable security issues have been uncovered in libvncserver, some of which might allow a remote authenticated user code execution or application crashes.
    last seen 2019-02-21
    modified 2018-12-19
    plugin id 77837
    published 2014-09-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=77837
    title FreeBSD : krfb -- Multiple security issues in bundled libvncserver (fb25333d-442f-11e4-98f3-5453ed2e2b49)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2014-1827.NASL
    description Updated kdenetwork packages that fix three security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kdenetwork packages contain networking applications for the K Desktop Environment (KDE). Krfb Desktop Sharing, which is a part of the kdenetwork package, is a server application that allows session sharing between users. Krfb uses the LibVNCServer library. A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. Note: Prior to this update, the kdenetwork packages used an embedded copy of the LibVNCServer library. With this update, the kdenetwork packages have been modified to use the system LibVNCServer packages. Therefore, the update provided by RHSA-2014:1826 must be installed to fully address the issues in krfb described above. All kdenetwork users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running instances of the krfb server must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 79219
    published 2014-11-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79219
    title CentOS 7 : kdenetwork (CESA-2014:1827)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20141111_KDENETWORK_ON_SL7_X.NASL
    description A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Note: Prior to this update, the kdenetwork packages used an embedded copy of the LibVNCServer library. With this update, the kdenetwork packages have been modified to use the system LibVNCServer packages. Therefore, the update provided by SLSA-2014:1826 must be installed to fully address the issues in krfb described above. All running instances of the krfb server must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-12-28
    plugin id 79229
    published 2014-11-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79229
    title Scientific Linux Security Update : kdenetwork on SL7.x x86_64
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-11541.NASL
    description Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-05
    plugin id 78053
    published 2014-10-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78053
    title Fedora 19 : libvncserver-0.9.10-0.6.20140718git9453be42.fc19 (2014-11541)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-11464.NASL
    description security fix, unbundles libvncserver and uses the system libvncserver. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-05
    plugin id 78095
    published 2014-10-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=78095
    title Fedora 19 : krfb-4.11.5-4.fc19 (2014-11464)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2014-1827.NASL
    description Updated kdenetwork packages that fix three security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kdenetwork packages contain networking applications for the K Desktop Environment (KDE). Krfb Desktop Sharing, which is a part of the kdenetwork package, is a server application that allows session sharing between users. Krfb uses the LibVNCServer library. A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. Note: Prior to this update, the kdenetwork packages used an embedded copy of the LibVNCServer library. With this update, the kdenetwork packages have been modified to use the system LibVNCServer packages. Therefore, the update provided by RHSA-2014:1826 must be installed to fully address the issues in krfb described above. All kdenetwork users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running instances of the krfb server must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-12-20
    plugin id 79203
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79203
    title RHEL 7 : kdenetwork (RHSA-2014:1827)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-3081.NASL
    description Several vulnerabilities have been discovered in libvncserver, a library to implement VNC server functionality. These vulnerabilities might result in the execution of arbitrary code or denial of service in both the client and the server side.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 79629
    published 2014-12-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79629
    title Debian DSA-3081-1 : libvncserver - security update
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-197.NASL
    description Several vulnerabilities have been discovered in libvncserver, a library to implement VNC server functionality. These vulnerabilities might result in the execution of arbitrary code or denial of service in both the client and the server side. For the oldstable distribution (squeeze), these problems have been fixed in version 0.9.7-2+deb6u1. This update has been prepared by Nguyen Cong. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-07-06
    plugin id 82784
    published 2015-04-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=82784
    title Debian DLA-197-1 : libvncserver security update
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20141111_LIBVNCSERVER_ON_SL6_X.NASL
    description An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052) A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) All running applications linked against libvncserver must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-12-28
    plugin id 79230
    published 2014-11-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79230
    title Scientific Linux Security Update : libvncserver on SL6.x, SL7.x i386/x86_64
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-2365-1.NASL
    description Nicolas Ruff discovered that LibVNCServer incorrectly handled memory when being advertised large screen sizes by the server. If a user were tricked into connecting to a malicious server, an attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2014-6051, CVE-2014-6052) Nicolas Ruff discovered that LibVNCServer incorrectly handled large ClientCutText messages. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service. (CVE-2014-6053) Nicolas Ruff discovered that LibVNCServer incorrectly handled zero scaling factor values. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service. (CVE-2014-6054) Nicolas Ruff discovered that LibVNCServer incorrectly handled memory in the file transfer feature. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-6055). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-01
    plugin id 77982
    published 2014-09-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=77982
    title Ubuntu 12.04 LTS / 14.04 LTS : libvncserver vulnerabilities (USN-2365-1)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2014-1826.NASL
    description From Red Hat Security Advisory 2014:1826 : Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052) A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 79199
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79199
    title Oracle Linux 6 / 7 : libvncserver (ELSA-2014-1826)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2015-2110-1.NASL
    description The libvncserver package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 87105
    published 2015-11-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87105
    title SUSE SLED11 / SLES11 Security Update : LibVNCServer (SUSE-SU-2015:2110-1)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2014-1826.NASL
    description Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052) A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 79188
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79188
    title CentOS 6 / 7 : libvncserver (CESA-2014:1826)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2015-2088-1.NASL
    description The LibVNCServer package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. - bsc#854151: Restrict the SSL cipher suite. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 87064
    published 2015-11-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87064
    title SUSE SLED12 / SLES12 Security Update : LibVNCServer (SUSE-SU-2015:2088-1)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201507-07.NASL
    description The remote host is affected by the vulnerability described in GLSA-201507-07 (LibVNCServer: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in LibVNCServer. Please review the CVE identifiers referenced below for details. Impact : A remote attacker may be able to execute arbitrary code with the privileges of the process or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-12-05
    plugin id 84606
    published 2015-07-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=84606
    title GLSA-201507-07 : LibVNCServer: Multiple vulnerabilities
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_CB3F036D8C7F11E6924A60A44CE6887B.NASL
    description Nicolas Ruff reports : Integer overflow in MallocFrameBuffer() on client side. Lack of malloc() return value checking on client side. Server crash on a very large ClientCutText message. Server crash when scaling factor is set to zero. Multiple stack overflows in File Transfer feature.
    last seen 2018-11-24
    modified 2018-11-23
    plugin id 93990
    published 2016-10-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93990
    title FreeBSD : libvncserver -- multiple security vulnerabilities (cb3f036d-8c7f-11e6-924a-60a44ce6887b)
  • NASL family Mandriva Local Security Checks
    NASL id MANDRIVA_MDVSA-2014-229.NASL
    description Updated libvncserver packages fix security vulnerabilities : A malicious VNC server can trigger incorrect memory management handling by advertising a large screen size parameter to the VNC client. This would result in multiple memory corruptions and could allow remote code execution on the VNC client (CVE-2014-6051, CVE-2014-6052). A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054). A malicious VNC client can trigger multiple stack-based buffer overflows by passing a long file and directory names and/or attributes (FileTime) when using the file transfer message feature (CVE-2014-6055). Additionally libvncserver has been built against the new system minilzo library which is also being provided with this advisory.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 79589
    published 2014-11-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79589
    title Mandriva Linux Security Advisory : libvncserver (MDVSA-2014:229)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2015-2088-2.NASL
    description The LibVNCServer package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. - bsc#854151: Restrict the SSL cipher suite. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 87721
    published 2016-01-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87721
    title SUSE SLES12 Security Update : LibVNCServer (SUSE-SU-2015:2088-2)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2014-1826.NASL
    description Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052) A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053) A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6054) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect.
    last seen 2019-02-21
    modified 2018-11-26
    plugin id 79202
    published 2014-11-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79202
    title RHEL 6 / 7 : libvncserver (RHSA-2014:1826)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2014-11537.NASL
    description Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-05
    plugin id 77942
    published 2014-09-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=77942
    title Fedora 20 : libvncserver-0.9.10-0.6.20140718git9453be42.fc20 (2014-11537)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2015-851.NASL
    description The LibVNCServer package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. - bsc#854151: Restrict the SSL cipher suite.
    last seen 2019-02-21
    modified 2015-12-16
    plugin id 87389
    published 2015-12-16
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=87389
    title openSUSE Security Update : LibVNCServer (openSUSE-2015-851)
redhat via4
advisories
  • bugzilla
    id 1144293
    title CVE-2014-6055 libvncserver: server stacked-based buffer overflow flaws in file transfer handling
    oval
    OR
    • AND
      • OR
        • comment Red Hat Enterprise Linux 7 Client is installed
          oval oval:com.redhat.rhba:tst:20150364001
        • comment Red Hat Enterprise Linux 7 Server is installed
          oval oval:com.redhat.rhba:tst:20150364002
        • comment Red Hat Enterprise Linux 7 Workstation is installed
          oval oval:com.redhat.rhba:tst:20150364003
        • comment Red Hat Enterprise Linux 7 ComputeNode is installed
          oval oval:com.redhat.rhba:tst:20150364004
      • OR
        • AND
          • comment libvncserver is earlier than 0:0.9.9-9.el7_0.1
            oval oval:com.redhat.rhsa:tst:20141826005
          • comment libvncserver is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20141826006
        • AND
          • comment libvncserver-devel is earlier than 0:0.9.9-9.el7_0.1
            oval oval:com.redhat.rhsa:tst:20141826007
          • comment libvncserver-devel is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20141826008
    • AND
      • OR
        • comment Red Hat Enterprise Linux 6 Client is installed
          oval oval:com.redhat.rhba:tst:20111656001
        • comment Red Hat Enterprise Linux 6 Server is installed
          oval oval:com.redhat.rhba:tst:20111656002
        • comment Red Hat Enterprise Linux 6 Workstation is installed
          oval oval:com.redhat.rhba:tst:20111656003
        • comment Red Hat Enterprise Linux 6 ComputeNode is installed
          oval oval:com.redhat.rhba:tst:20111656004
      • OR
        • AND
          • comment libvncserver is earlier than 0:0.9.7-7.el6_6.1
            oval oval:com.redhat.rhsa:tst:20141826013
          • comment libvncserver is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20141826006
        • AND
          • comment libvncserver-devel is earlier than 0:0.9.7-7.el6_6.1
            oval oval:com.redhat.rhsa:tst:20141826014
          • comment libvncserver-devel is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20141826008
    rhsa
    id RHSA-2014:1826
    released 2014-11-11
    severity Moderate
    title RHSA-2014:1826: libvncserver security update (Moderate)
  • bugzilla
    id 1144293
    title CVE-2014-6055 libvncserver: server stacked-based buffer overflow flaws in file transfer handling
    oval
    AND
    • OR
      • comment Red Hat Enterprise Linux 7 Client is installed
        oval oval:com.redhat.rhba:tst:20150364001
      • comment Red Hat Enterprise Linux 7 Server is installed
        oval oval:com.redhat.rhba:tst:20150364002
      • comment Red Hat Enterprise Linux 7 Workstation is installed
        oval oval:com.redhat.rhba:tst:20150364003
      • comment Red Hat Enterprise Linux 7 ComputeNode is installed
        oval oval:com.redhat.rhba:tst:20150364004
    • OR
      • AND
        • comment kdenetwork is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827005
        • comment kdenetwork is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110465006
      • AND
        • comment kdenetwork-common is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827013
        • comment kdenetwork-common is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827014
      • AND
        • comment kdenetwork-devel is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827019
        • comment kdenetwork-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20110465010
      • AND
        • comment kdenetwork-fileshare-samba is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827031
        • comment kdenetwork-fileshare-samba is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827032
      • AND
        • comment kdenetwork-kdnssd is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827015
        • comment kdenetwork-kdnssd is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827016
      • AND
        • comment kdenetwork-kget is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827017
        • comment kdenetwork-kget is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827018
      • AND
        • comment kdenetwork-kget-libs is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827007
        • comment kdenetwork-kget-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827008
      • AND
        • comment kdenetwork-kopete is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827025
        • comment kdenetwork-kopete is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827026
      • AND
        • comment kdenetwork-kopete-devel is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827033
        • comment kdenetwork-kopete-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827034
      • AND
        • comment kdenetwork-kopete-libs is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827023
        • comment kdenetwork-kopete-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827024
      • AND
        • comment kdenetwork-krdc is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827011
        • comment kdenetwork-krdc is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827012
      • AND
        • comment kdenetwork-krdc-devel is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827021
        • comment kdenetwork-krdc-devel is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827022
      • AND
        • comment kdenetwork-krdc-libs is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827027
        • comment kdenetwork-krdc-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827028
      • AND
        • comment kdenetwork-krfb is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827029
        • comment kdenetwork-krfb is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827030
      • AND
        • comment kdenetwork-krfb-libs is earlier than 7:4.10.5-8.el7_0
          oval oval:com.redhat.rhsa:tst:20141827009
        • comment kdenetwork-krfb-libs is signed with Red Hat redhatrelease2 key
          oval oval:com.redhat.rhsa:tst:20141827010
    rhsa
    id RHSA-2014:1827
    released 2014-11-11
    severity Moderate
    title RHSA-2014:1827: kdenetwork security update (Moderate)
  • rhsa
    id RHSA-2015:0113
rpms
  • libvncserver-0:0.9.9-9.el7_0.1
  • libvncserver-devel-0:0.9.9-9.el7_0.1
  • libvncserver-0:0.9.7-7.el6_6.1
  • libvncserver-devel-0:0.9.7-7.el6_6.1
  • kdenetwork-7:4.10.5-8.el7_0
  • kdenetwork-common-7:4.10.5-8.el7_0
  • kdenetwork-devel-7:4.10.5-8.el7_0
  • kdenetwork-fileshare-samba-7:4.10.5-8.el7_0
  • kdenetwork-kdnssd-7:4.10.5-8.el7_0
  • kdenetwork-kget-7:4.10.5-8.el7_0
  • kdenetwork-kget-libs-7:4.10.5-8.el7_0
  • kdenetwork-kopete-7:4.10.5-8.el7_0
  • kdenetwork-kopete-devel-7:4.10.5-8.el7_0
  • kdenetwork-kopete-libs-7:4.10.5-8.el7_0
  • kdenetwork-krdc-7:4.10.5-8.el7_0
  • kdenetwork-krdc-devel-7:4.10.5-8.el7_0
  • kdenetwork-krdc-libs-7:4.10.5-8.el7_0
  • kdenetwork-krfb-7:4.10.5-8.el7_0
  • kdenetwork-krfb-libs-7:4.10.5-8.el7_0
refmap via4
bid 70096
confirm
debian DSA-3081
fedora
  • FEDORA-2014-11537
  • FEDORA-2014-11685
gentoo GLSA-201507-07
misc http://www.ocert.org/advisories/ocert-2014-007.html
mlist
  • [oss-security] 20140923 Multiple issues in libVNCserver
  • [oss-security] 20140925 [oCERT-2014-007] libvncserver multiple issues
secunia 61506
suse openSUSE-SU-2015:2207
xf libvncserver-cve20146055-bo(96187)
Last major update 21-12-2016 - 21:59
Published 30-09-2014 - 12:55
Last modified 07-09-2017 - 21:29
Back to Top