CVE-2019-8273: kaspersky lab ultravnc Heap-based Buffer Overflow

Vulnerability summary

CVE-2019-8273 is a critical (CVSS 9.8) Heap-based Buffer Overflow vulnerability in kaspersky lab ultravnc. EPSS estimates a 8.26% chance of exploitation in the next 30 days, higher than 94.8% of scored vulnerabilities.

Timeline

1. 09-03-2019
   PublishedVulnerability first disclosed.
2. 16-09-2024
   Last modifiedVulnerability information updated.

Description

UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer request handler, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.