CVE-2016-9942: libvncserver_project libvncserver

Vulnerability summary

CVE-2016-9942 is a critical (CVSS 9.8) vulnerability in libvncserver_project libvncserver. EPSS estimates a 3.82% chance of exploitation in the next 30 days, higher than 89.9% of scored vulnerabilities.

Timeline

1. 31-12-2016
   PublishedVulnerability first disclosed.
2. 06-08-2024
   Last modifiedVulnerability information updated.

Description

Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.