Summary : Heap corruption in CDG decoder
Date : January 2011
Affected versions : VLC media player 1.1.5 and earlier
ID : VideoLAN-SA-1101
CVE reference : CVE-2011-0021
Details
When parsing an invalid CDG file,
insufficient boundary checks might lead to corruption of the heap.
Impact
If successful,
it is unknown whether a malicious third party might be able
to trigger execution of arbitrary code.
Successful exploitation of this bug can crash the process of the media player.
Threat mitigation
Exploitation of this issue requires the user
to explicitly open a specially crafted file.
Workarounds
The user should refrain from opening files from untrusted third parties
or accessing untrusted remote sites (or disable the VLC browser plugins),
until the patch is applied.
Alternatively, the CDG decoder plugin
(libcdg_plugin.*)
can be removed manually from the VLC plugin installation directory.
Solution
VLC media player 1.1.6 addresses this issue.
Patches for older versions are available
from the official VLC source code repositories.
Credits
This vulnerability was reported by Dan Rosenberg from VSR.
