Description
LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/cursor.c. An attacker sends cursor shapes with specially crafted dimensions, which can result in remote code execution.
References (1)
Core 1
Core References
Various Sources third-party-advisory
https://ics-cert.kaspersky.com/vulnerabilities/klcert-20-009-remote-code-execution-on-libvnc-version-prior-to-0-9-12/
Scores
CVSS v3
8.8
EPSS
0.0433
EPSS Percentile
89.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-122
Status
published
Products (1)
LibVNC/LibVNCServer
< 0.9.12
Published
Jan 24, 2025
Tracked Since
Feb 18, 2026