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CVE-2014-6052

Published: 24 September 2014

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.

Notes

AuthorNote
mdeslaur
same patches as CVE-2014-6051
krfb is only a server, this issue is client side.

Priority

Medium

Status

Package Release Status
italc
Launchpad, Ubuntu, Debian
bionic
Released (1:3.0.1+dfsg1-1)
focal Does not exist

trusty Does not exist
(trusty was needed)
upstream
Released (1:3.0.3+dfsg1-1+deb9u1, 1:2.0.2+dfsg1-2+deb8u1)
xenial
Released (1:2.0.2+dfsg1-4ubuntu0.1)
krfb
Launchpad, Ubuntu, Debian
upstream Needs triage

lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was not-affected)
libvncserver
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise
Released (0.9.8.2-2ubuntu1.1)
trusty
Released (0.9.9+dfsg-1ubuntu1.1)
upstream Needs triage

Patches:
upstream: https://github.com/newsoft/libvncserver/commit/045a044e8ae79db9244593fbce154cdf6e843273
upstream: https://github.com/newsoft/libvncserver/commit/85a778c0e45e87e35ee7199f1f25020648e8b812