ID CVE-2016-10207
Summary The Xvnc server in TigerVNC allows remote attackers to cause a denial of service (invalid memory access and crash) by terminating a TLS handshake early.
References
Vulnerable Configurations
  • openSUSE Leap 42.1
    cpe:2.3:o:opensuse:leap:42.1
  • openSUSE Leap 42.2
    cpe:2.3:o:opensuse:leap:42.2
  • TigerVNC 0.0.90
    cpe:2.3:a:tigervnc:tigervnc:0.0.90
  • TigerVNC 0.0.91
    cpe:2.3:a:tigervnc:tigervnc:0.0.91
  • TigerVNC 1.0
    cpe:2.3:a:tigervnc:tigervnc:1.0
  • TigerVNC 1.0.1
    cpe:2.3:a:tigervnc:tigervnc:1.0.1
  • TigerVNC 1.1.0
    cpe:2.3:a:tigervnc:tigervnc:1.1.0
  • TigerVNC 1.3
    cpe:2.3:a:tigervnc:tigervnc:1.3
  • TigerVNC 1.3.1
    cpe:2.3:a:tigervnc:tigervnc:1.3.1
  • TigerVNC 1.7
    cpe:2.3:a:tigervnc:tigervnc:1.7
CVSS
Base: 5.0 (as of 01-03-2017 - 11:28)
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 NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE PARTIAL
nessus via4
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201801-13.NASL
    description The remote host is affected by the vulnerability described in GLSA-201801-13 (TigerVNC: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in TigerVNC. Please review the referenced CVE Identifiers for details. Impact : An attacker could execute arbitrary code or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-01-26
    plugin id 105757
    published 2018-01-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=105757
    title GLSA-201801-13 : TigerVNC: Multiple vulnerabilities
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2017-0630.NASL
    description From Red Hat Security Advisory 2017:0630 : An update for tigervnc is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients. The tigervnc packages contain a client which allows users to connect to other desktops running a VNC server. Security Fix(es) : * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section.
    last seen 2019-02-21
    modified 2018-07-25
    plugin id 99065
    published 2017-03-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=99065
    title Oracle Linux 6 : tigervnc (ELSA-2017-0630)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2017-0630.NASL
    description An update for tigervnc is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients. The tigervnc packages contain a client which allows users to connect to other desktops running a VNC server. Security Fix(es) : * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 97953
    published 2017-03-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=97953
    title CentOS 6 : tigervnc (CESA-2017:0630)
  • NASL family Huawei Local Security Checks
    NASL id EULEROS_SA-2017-1227.NASL
    description According to the versions of the tigervnc packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) - A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) - A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) - An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) - A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) - A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) - A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS 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 2018-11-14
    plugin id 103085
    published 2017-09-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103085
    title EulerOS 2.0 SP1 : tigervnc (EulerOS-SA-2017-1227)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2017-243.NASL
    description This update for tigervnc fixes the following issues : This security issue was fixed : - CVE-2016-10207: Prevent crash caused by failed TLS connection (bnc#1023012) This non-security issue was fixed : - Fix random client disconnections (boo#1022432)
    last seen 2019-02-21
    modified 2017-03-07
    plugin id 97115
    published 2017-02-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=97115
    title openSUSE Security Update : tigervnc (openSUSE-2017-243)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2017-0630.NASL
    description An update for tigervnc is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients. The tigervnc packages contain a client which allows users to connect to other desktops running a VNC server. Security Fix(es) : * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section.
    last seen 2019-02-21
    modified 2018-11-26
    plugin id 97876
    published 2017-03-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=97876
    title RHEL 6 : tigervnc (RHSA-2017:0630)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2017-2000.NASL
    description From Red Hat Security Advisory 2017:2000 : An update for tigervnc and fltk is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients which allows users to connect to other desktops running a VNC server. FLTK (pronounced 'fulltick') is a cross-platform C++ GUI toolkit. It provides modern GUI functionality without the bloat, and supports 3D graphics via OpenGL and its built-in GLUT emulation. The following packages have been upgraded to a later upstream version: tigervnc (1.8.0), fltk (1.3.4). (BZ#1388620, BZ#1413598) Security Fix(es) : * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) * A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) * An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) * A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) * A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.
    last seen 2019-02-21
    modified 2018-07-25
    plugin id 102293
    published 2017-08-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=102293
    title Oracle Linux 7 : fltk / tigervnc (ELSA-2017-2000)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2017-2000.NASL
    description An update for tigervnc and fltk is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients which allows users to connect to other desktops running a VNC server. FLTK (pronounced 'fulltick') is a cross-platform C++ GUI toolkit. It provides modern GUI functionality without the bloat, and supports 3D graphics via OpenGL and its built-in GLUT emulation. The following packages have been upgraded to a later upstream version: tigervnc (1.8.0), fltk (1.3.4). (BZ#1388620, BZ#1413598) Security Fix(es) : * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) * A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) * An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) * A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) * A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.
    last seen 2019-02-21
    modified 2018-11-26
    plugin id 102109
    published 2017-08-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=102109
    title RHEL 7 : tigervnc and fltk (RHSA-2017:2000)
  • NASL family Huawei Local Security Checks
    NASL id EULEROS_SA-2017-1228.NASL
    description According to the versions of the tigervnc packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) - A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) - A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) - An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) - A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) - A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) - A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396) Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS 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 2018-11-14
    plugin id 103086
    published 2017-09-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=103086
    title EulerOS 2.0 SP2 : tigervnc (EulerOS-SA-2017-1228)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2017-0622-1.NASL
    description This update for tigervnc provides the following fixes : - Prevent malicious server from crashing a server via a buffer overflow, a similar flaw as the LibVNCServer issues CVE-2016-9941 and CVE-2016-9942. (bsc#1019274) - CVE-2016-10207: Prevent potential crash due to insufficient clean-up after failure to establish TLS connection. (bsc#1023012) 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 2018-11-30
    plugin id 97598
    published 2017-03-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=97598
    title SUSE SLED12 / SLES12 Security Update : tigervnc (SUSE-SU-2017:0622-1)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2017-2000.NASL
    description An update for tigervnc and fltk is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients which allows users to connect to other desktops running a VNC server. FLTK (pronounced 'fulltick') is a cross-platform C++ GUI toolkit. It provides modern GUI functionality without the bloat, and supports 3D graphics via OpenGL and its built-in GLUT emulation. The following packages have been upgraded to a later upstream version: tigervnc (1.8.0), fltk (1.3.4). (BZ#1388620, BZ#1413598) Security Fix(es) : * A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) * A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) * A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) * An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) * A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) * A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) * A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396) Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 102748
    published 2017-08-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=102748
    title CentOS 7 : fltk / tigervnc (CESA-2017:2000)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20170321_TIGERVNC_ON_SL6_X.NASL
    description Security Fix(es) : - A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) - A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581)
    last seen 2019-02-21
    modified 2018-12-27
    plugin id 99227
    published 2017-04-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=99227
    title Scientific Linux Security Update : tigervnc on SL6.x i386/x86_64
  • NASL family Amazon Linux Local Security Checks
    NASL id ALA_ALAS-2017-879.NASL
    description Buffer overflow in ModifiablePixelBuffer::fillRect A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) VNC server can crash when TLS handshake terminates early : A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) SSecurityVeNCrypt memory leak : A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) Double free via crafted fences : A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) Server crash via long usernames : A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) Integer overflow in SMsgReader::readClientCutText : An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) SecurityServer and ClientServer memory leaks : A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396)
    last seen 2019-02-21
    modified 2018-04-18
    plugin id 102867
    published 2017-09-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=102867
    title Amazon Linux AMI : tigervnc (ALAS-2017-879)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20170801_TIGERVNC_AND_FLTK_ON_SL7_X.NASL
    description FLTK (pronounced 'fulltick') is a cross-platform C++ GUI toolkit. It provides modern GUI functionality without the bloat, and supports 3D graphics via OpenGL and its built-in GLUT emulation. The following packages have been upgraded to a later upstream version: tigervnc (1.8.0), fltk (1.3.4). Security Fix(es) : - A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207) - A double free flaw was found in the way TigerVNC handled ClientFence messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientFence messages, resulting in denial of service. (CVE-2017-7393) - A missing input sanitization flaw was found in the way TigerVNC handled credentials. A remote unauthenticated attacker could use this flaw to make Xvnc crash by sending specially crafted usernames, resulting in denial of service. (CVE-2017-7394) - An integer overflow flaw was found in the way TigerVNC handled ClientCutText messages. A remote, authenticated attacker could use this flaw to make Xvnc crash by sending specially crafted ClientCutText messages, resulting in denial of service. (CVE-2017-7395) - A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581) - A memory leak flaw was found in the way TigerVNC handled termination of VeNCrypt connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7392) - A memory leak flaw was found in the way TigerVNC handled client connections. A remote unauthenticated attacker could repeatedly send connection requests to the Xvnc server, causing it to consume large amounts of memory resources over time, and ultimately leading to a denial of service due to memory exhaustion. (CVE-2017-7396)
    last seen 2019-02-21
    modified 2018-12-27
    plugin id 102658
    published 2017-08-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=102658
    title Scientific Linux Security Update : tigervnc and fltk on SL7.x x86_64
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2017-0519-1.NASL
    description This update for tigervnc provides the following fixes : - Prevent malicious server from crashing a server via a buffer overflow, a similar flaw as the LibVNCServer issues CVE-2016-9941 and CVE-2016-9942.. (bsc#1019274) - CVE-2016-10207: Prevent potential crash due to insufficient clean-up after failure to establish TLS connection. (bsc#1023012) 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 2018-11-30
    plugin id 97299
    published 2017-02-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=97299
    title SUSE SLED12 / SLES12 Security Update : tigervnc (SUSE-SU-2017:0519-1)
redhat via4
advisories
  • rhsa
    id RHSA-2017:0630
  • rhsa
    id RHSA-2017:2000
rpms
  • tigervnc-0:1.1.0-24.el6
  • tigervnc-server-0:1.1.0-24.el6
  • tigervnc-server-applet-0:1.1.0-24.el6
  • tigervnc-server-module-0:1.1.0-24.el6
  • fltk-0:1.3.4-1.el7
  • fltk-devel-0:1.3.4-1.el7
  • fltk-fluid-0:1.3.4-1.el7
  • fltk-static-0:1.3.4-1.el7
  • tigervnc-0:1.8.0-1.el7
  • tigervnc-icons-0:1.8.0-1.el7
  • tigervnc-license-0:1.8.0-1.el7
  • tigervnc-server-0:1.8.0-1.el7
  • tigervnc-server-applet-0:1.8.0-1.el7
  • tigervnc-server-minimal-0:1.8.0-1.el7
  • tigervnc-server-module-0:1.8.0-1.el7
refmap via4
bid 96012
confirm
gentoo GLSA-201801-13
mlist
  • [oss-security] 20170202 CVE request tigervnc: vnc server can crash when TLS handshake terminates early
  • [oss-security] 20170204 Re: CVE request tigervnc: vnc server can crash when TLS handshake terminates early
suse openSUSE-SU-2017:0444
Last major update 02-03-2017 - 11:10
Published 28-02-2017 - 13:59
Last modified 01-02-2018 - 12:05
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