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Category:   Application (Multimedia)  >   MPlayer Vendors:
MPlayer Heap Overflow in Real Media Demuxer Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020952
SecurityTracker URL:
CVE Reference:   CVE-2008-3827   (Links to External Site)
Date:  Sep 29 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.0_rc2 and prior versions
Description:   A vulnerability was reported in MPlayer. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted Real media video file that, when loaded by the target user, will trigger a heap overflow and execute arbitrary code on the target system. The code will run with the privileges of the target user.

The vulnerability resides in 'libmpdemux/demux_real.c'.

The vendor was notified on August 24, 2008.

Felipe Andres Manzano reported this vulnerability.

The original advisory is available at:

Impact:   A remote user can create a video file that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   A third party patch is available at:

[Editor's note: At the time of this entry, the patch was not available via the vendor's public SVN repository.]

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any)

Message History:   None.

 Source Message Contents

Date:  Mon, 29 Sep 2008 16:00:52 +0000
Subject:  [oCERT-2008-013] MPlayer Real demuxer heap overflow

2008/09/29 #2008-013 MPlayer Real demuxer heap overflow


The MPlayer multimedia player suffers from a vulnerability which could result
in arbitrary code execution and at the least, in unexpected process

Three integer underflows located in the Real demuxer code can be used to
exploit a heap overflow, a specific video file can be crafted in order to make
the stream_read function reading or writing arbitrary amounts of memory.

The following patch fixes the issue:

Affected version:

MPlayer <= 1.0_rc2

Fixed version:

MPlayer, N/A

Credit: vulnerability report, patch and PoC code received from Felipe Andres
Manzano <fmanzano [at] fceia [dot] unr [dot] edu [dot] ar>.

CVE: CVE-2008-3827

2008-08-12: vulnerability report received
2008-08-24: contacted mplayer maintainers
2008-08-25: maintainer provides patch
2008-08-28: reporter indicates that the patch is incomplete and sends new PoC
2008-09-15: maintainer provides updated patch
2008-09-16: reporter confirms patch
2008-09-29: advisory release




Andrea Barisani |                Founder & Project Coordinator
          oCERT | Open Source Computer Emergency Response Team

 0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E
        "Pluralitas non est ponenda sine necessitate"


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