TigerVNC up to 1.3.0 common/rfb/zrleDecode.h ZRLE_DECODE out-of-bounds write

Summaryinfo

A vulnerability was found in TigerVNC up to 1.3.0. It has been classified as critical. This issue affects the function ZRLE_DECODE of the file common/rfb/zrleDecode.h. The manipulation leads to out-of-bounds write. This vulnerability is traded as CVE-2014-0011. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in TigerVNC up to 1.3.0. This issue affects the function ZRLE_DECODE of the file common/rfb/zrleDecode.h. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Multiple heap-based buffer overflows in the ZRLE_DECODE function in common/rfb/zrleDecode.h in TigerVNC before 1.3.1, when NDEBUG is enabled, allow remote VNC servers to cause a denial of service (vncviewer crash) and possibly execute arbitrary code via vectors related to screen image rendering.

The weakness was shared 04/22/2023. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2014-0011 since 12/03/2013. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 78881 (GLSA-201411-03 : TigerVNC: User-assisted execution of arbitrary code), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350126 (Amazon Linux Security Advisory for tigervnc: ALAS-2015-576).

Upgrading to version 1.3.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (78881). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• TigerVNC

Version

• 1.0
• 1.1
• 1.2
• 1.3.0

Website

• Product: https://github.com/TigerVNC/tigervnc/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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