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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.0131
          A vulnerability has been identified in VLC media player
                              31 January 2013

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           VLC media player
Publisher:         The VideoLAN Project
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Windows
                   Mobile Device
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade

Original Bulletin: 
   http://www.videolan.org/security/sa1302.html

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Security Advisory 1302

Summary           : Buffer Overflow in ASF Demuxer
Date              : January 2013
Affected versions : VLC media player 2.0.5 and earlier
ID                : VideoLAN-SA-1302
CVE reference     : CVE-XXXX-XXXX

Details

When parsing a specially crafted ASF movie, a buffer overflow might occur.

Impact

If successful, a malicious third party could trigger an invalid memory access, 
leading to a crash of VLC media player's process. In some cases attackers might 
exploit this issue to execute arbitrary code within the context of the 
application but this information is not confirmed.

Threat mitigation

Exploitation of this issue requires the user to explicitly open a specially 
crafted ASF movie.

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 ASF demuxer (libasf_plugin.*) can be removed manually from 
the VLC plugin installation directory. This will prevent ASF movie playback.

Solution

This issue is addressed in VLC media player 2.0.x source code repository by 
replacing a macro with a static inline and improved bounds checking.

This patch is included in VLC's future 2.0.6 release.

Windows and Mac OS X builds can be found on the VideoLAN nightlies website.

Credits

This vulnerability was reported by Debasish Mandal.
References

The VideoLAN project
    http://www.videolan.org/ 
VLC official GIT repository
    http://git.videolan.org/?p=vlc.git 

History

xx Jan 2013
    VLC media player 2.0.6 release.
17 Jan 2013
    Nightly builds version of VLC 2.0.6 released for testing purposes.
17 Jan 2013
    Patch for VLC media player committed to the source code repository, and to
    the stable branch.
11 Jan 2013
    Crash reported to the VLC project.

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