CVE-2014-6054: Canonical Ubuntu Linux

Medium severity, CVSS 4.3. EPSS: 5.5% chance of exploitation in the next 30 days.

The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier allows remote attackers to cause a denial of service (divide-by-zero error and server crash) via a zero value in the scaling factor in a (1) PalmVNCSetScaleFactor or (2) SetScale 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

Published 2014-10-06. Last modified 2026-06-17.