FFmpeg up to 2.7.1 libavcodec/mpegvideo.c ff_mpv_common_init input validation

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CTI Interest Score
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A vulnerability was found in FFmpeg up to 2.7.1 (Multimedia Processing Software). It has been classified as problematic. Affected is the function ff_mpv_common_init of the file libavcodec/mpegvideo.c. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

The ff_mpv_common_init function in libavcodec/mpegvideo.c in FFmpeg before 2.7.2 does not properly maintain the encoding context, which allows remote attackers to cause a denial of service (invalid pointer access) or possibly have unspecified other impact via crafted MPEG data.

The weakness was released 09/06/2015 (Website). The advisory is available at git.videolan.org. This vulnerability is traded as CVE-2015-6821 since 09/05/2015. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 86044 (FreeBSD : ffmpeg -- multiple vulnerabilities (3d950687-b4c9-4a86-8478-c56743547af8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176784 (Debian Security Update for libav (DLA 1611-1)).

Upgrading to version 2.7.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (86044). Entries connected to this vulnerability are available at 73166, 77583, 77584 and 77585.





  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍


Nessus ID: 86044
Nessus Name: FreeBSD : ffmpeg -- multiple vulnerabilities (3d950687-b4c9-4a86-8478-c56743547af8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 12024
OpenVAS Name: Mageia Linux Local Check: mgasa-2016-0018
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍
Upgrade: FFmpeg 2.7.2
Patch: b160fc290cf49b516c5b6ee0730fd9da7fc623b1


09/05/2015 🔍
09/05/2015 +0 days 🔍
09/05/2015 +0 days 🔍
09/06/2015 +1 days 🔍
09/07/2015 +1 days 🔍
10/09/2015 +32 days 🔍
06/14/2022 +2440 days 🔍


Product: ffmpeg.org

Advisory: DLA 1611-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-6821 (🔍)
SecurityTracker: 1033483
Vulnerability Center: 53323 - FFmpeg before 2.7.2 Remote DoS or Unspecified Other Impact in ff_mpv_common_init Function via Crafted MPEG Data, High
SecurityFocus: 77073

See also: 🔍


Created: 09/07/2015 10:12 AM
Updated: 06/14/2022 10:48 AM
Changes: 09/07/2015 10:12 AM (62), 02/04/2018 10:28 AM (6), 06/14/2022 10:42 AM (6), 06/14/2022 10:48 AM (1)
Complete: 🔍


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