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                                   CERT-Renater

                        Note d'Information No. 2010/VULN571
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DATE                      : 31/12/2010

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running VLC media player versions prior to 1.1.6.

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http://www.videolan.org/security/sa1007.html
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Security Advisory 1007

Summary           : Buffer overflow in Real demuxer
Date              : December 2010
Affected versions : VLC media player 1.1.5 and earlier
ID                : VideoLAN-SA-1007
CVE reference     : CVE-2010-3907

Details

When parsing the header of an invalid Real Media file an integer overflow
might occur then trigger a heap-based buffer overflow.

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 proces 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 Real demuxer plugin (libreal_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.


References

The VideoLAN project
    http://www.videolan.org/
VLC official GIT repository
    http://git.videolan.org/?p=vlc.git;a=commitdiff;h=6568965770f906d34d4aef83237842a5376adb55;hp=403718957b551c3c27546b7f82b2ae9ba937652f
Dan Rosenberg, VSR
    http://www.vsecurity.com/

History

14 December 2010
    Vendor notified
    CVE ID reserved
15 December 2010
    Internal patches for VLC development and 1.1.x versions
29 December 2010
    Security advisory published
TBD
    VLC media player 1.1.6 released

Rémi Denis-Courmont,
on behalf of the VideoLAN project


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