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                             CERT-Renater

                 Note d'Information No. 2021/VULN040
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DATE                : 22/01/2021

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S):  Systems running VLC versions prior to 3.0.12.

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https://www.videolan.org/security/sb-vlc3012.html
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Security Bulletin VLC 3.0.12

Summary           : Multiple vulnerabilities fixed in VLC media player
Date              : December 2020
Affected versions : VLC media player 3.0.11 and earlier
ID                : VideoLAN-SB-VLC-3012


Details

A remote user could create a specifically crafted file that could
trigger some various issues, notably 2 read buffer overflows, and some
invalid pointers being dereferenced.


Impact

If successful, a malicious third party could trigger either a crash of
VLC or an arbitratry code execution with the privileges of the target
user.

While these issues in themselves are most likely to just crash the
player, we can't exclude that they could be combined to leak user
informations or remotely execute code. ASLR and DEP help reduce the
likelyness of code execution, but may be bypassed.

We have not seen exploits performing code execution through these
vulnerability


Threat mitigation

Exploitation of those issues requires the user to explicitly open a
specially crafted file or stream.


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.


Solution

VLC media player 3.0.12 addresses the issue.


Credits

All but one of the issues fixed in this version have been reported by
Zhen Zhou, NSFOCUS Security Team


References

The VideoLAN project
    http://www.videolan.org/

VLC official GIT repository
    http://git.videolan.org/?p=vlc.git


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+ CERT-RENATER       |    tel : 01-53-94-20-44          +
+ 23/25 Rue Daviel   |    fax : 01-53-94-20-41          +
+ 75013 Paris        |    email:cert@support.renater.fr +
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