CVE-2014-6052: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 6.8% chance of exploitation in the next 30 days.

The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and earlier does not check certain malloc return values, which allows remote VNC servers to cause a denial of service (application crash) or possibly execute arbitrary code by specifying a large screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3) PalmVNCReSizeFrameBuffer message.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only
• Debian Debian Linux: version 7.0 only
• Libvncserver Libvncserver: up to and including 0.9.9
• Oracle Solaris: version 11.3 only

Published 2014-12-15. Last modified 2026-06-17.