CVE-2019-15695: kaspersky tigervnc Stack-based Buffer Overflow

Vulnerability summary

CVE-2019-15695 is a high (CVSS 7.2) Stack-based Buffer Overflow vulnerability in kaspersky tigervnc. EPSS estimates a 4.49% chance of exploitation in the next 30 days, higher than 91.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 26-12-2019
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

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. 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.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
• CWE-754Improper Check for Unusual or Exceptional ConditionsThe product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.