VDB-10448 · SA54921 · OSVDB 97406

FFmpeg 2.0 Block Parameters libavcodec/flashsv.c flashsv_decode_frame Invalid Block Parameter array index

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability was found in FFmpeg 2.0 and classified as critical. This impacts the function flashsv_decode_frame of the file libavcodec/flashsv.c of the component Block Parameters Handler. Such manipulation as part of Invalid Block Parameter leads to array index. In addition, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in FFmpeg 2.0 (Multimedia Processing Software). It has been rated as critical. Affected by this issue is the function flashsv_decode_frame of the file libavcodec/flashsv.c of the component Block Parameters Handler. The manipulation as part of a Invalid Block Parameter leads to a array index vulnerability. Using CWE to declare the problem leads to CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. Impacted is confidentiality, integrity, and availability.

The issue has been introduced in 07/11/2013. The weakness was presented 08/20/2013 by Michael Niedermayer as avcodec/flashsv: check diff_start/height as confirmed git commit (GIT Repository). The advisory is shared for download at git.videolan.org. The public release was coordinated in cooperation with the vendor. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 40 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 0.11.4 eliminates this vulnerability. The upgrade is hosted for download at 880c73cd76109697447fbfbaa8e5ee5683309446. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.videolan.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at OSVDB (97406†) and Secunia (SA54921†). git.videolan.org is providing further details. See VDB-10447, VDB-10452 and VDB-10453 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • FFmpeg 2.0
  • Libav 9.8

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Array index
CWE: CWE-129 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: FFmpeg 0.11.4
Patch: git.videolan.org

Timelineinfo

07/11/2013 🔍
08/20/2013 +40 days 🔍
08/28/2013 +8 days 🔍
09/19/2013 +22 days 🔍
09/24/2013 +5 days 🔍
08/26/2017 +1432 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: avcodec/flashsv: check diff_start/height
Researcher: Michael Niedermayer
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-10448
Secunia: 54921 - FFmpeg Multiple Vulnerabilities, Moderately Critical
OSVDB: 97406

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 09/24/2013 13:09
Updated: 08/26/2017 06:42
Changes: 09/24/2013 13:09 (62), 08/26/2017 06:42 (1)
Complete: 🔍
Committer:
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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