ID CVE-2014-6053
Summary The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.
References
Vulnerable Configurations
  • cpe:2.3:a:libvncserver:libvncserver:0.9.9
    cpe:2.3:a:libvncserver:libvncserver:0.9.9
  • Canonical Ubuntu Linux 12.04 LTS
    cpe:2.3:o:canonical:ubuntu_linux:12.04:-:-:-:lts
  • Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)
    cpe:2.3:o:canonical:ubuntu_linux:14.04:-:-:-:lts
  • Debian Linux 7.0
    cpe:2.3:o:debian:debian_linux:7.0
CVSS
Base: 5.0 (as of 02-09-2016 - 16:50)
Impact:
Exploitability:
CWE CWE-19
CAPEC
  • 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.
  • XML Nested Payloads
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By nesting XML data and causing this data to be continuously self-referential, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization. An attacker's goal is to leverage parser failure to his or her advantage. In most cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it may be possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.230.1].
  • XML Oversized Payloads
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By supplying oversized payloads in input vectors that will be processed by the XML parser, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization, and potentially cause execution of arbitrary code. An attacker's goal is to leverage parser failure to his or her advantage. In many cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it is possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.231.1].
  • XML Client-Side Attack
    Client applications such as web browsers that process HTML data often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.484.1]
  • XML Parser Attack
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.99.1]
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE PARTIAL
nessus via4
  • 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 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
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
confirm https://github.com/newsoft/libvncserver/commit/6037a9074d52b1963c97cb28ea1096c7c14cbf28
debian DSA-3081
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
  • 61682
suse openSUSE-SU-2015:2207
ubuntu USN-2365-1
Last major update 21-12-2016 - 21:59
Published 15-12-2014 - 13:59
Back to Top