TigerVNC version prior to 1.10.1 Out-of-bounds Write Vulnerability

Summary

TigerVNC version prior to 1.10.1 is vulnerable to stack buffer overflow, which could be triggered from CMsgReader::readSetCursor. This vulnerability occurs due to insufficient sanitization of PixelFormat. 

Credit:

The information has been provided by Pavel Cheremushkin

The original article can be found at:https://www.openwall.com/lists/oss-security/2019/12/20/2


Details

Since remote attacker can choose offset from start of the buffer to start writing his values, exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.

 

Vulnerable Systems:

TigerVNC version prior to 1.10.1

 

CVE Information:

CVE-2019-15695

 

Disclosure Timeline:
Published Date:12/26/2019

Categories: News