VDB-12097 · OSVDB 102674 · GCVE-100-12097

FFmpeg 2.1 libavcodec/h264_refs.c ff_h264_execute_ref_pic_marking use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FFmpeg 2.1. This affects the function ff_h264_execute_ref_pic_marking of the file libavcodec/h264_refs.c. This manipulation causes use after free. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical was found in FFmpeg 2.1 (Multimedia Processing Software). Affected by this vulnerability is the function ff_h264_execute_ref_pic_marking of the file libavcodec/h264_refs.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The issue has been introduced in 10/29/2013. The weakness was disclosed 01/18/2014 by Mateusz Jurczyk and Gynvael Coldwind with Google Security Team as h264: prevent two matching fields from being both a short/long ref combination as confirmed git commit (GIT Repository). The advisory is shared at git.videolan.org. The public release has been coordinated in cooperation with the project team. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 81 days. During that time the estimated underground price was around $0-$5k.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.videolan.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (102674†). The entries VDB-12101, VDB-12100, VDB-12099 and VDB-12098 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

FFmpeg 2.1
Libav 0.8.9

Productinfo

Type

Multimedia Processing Software

Name

FFmpeg

Version

License

open-source

Website

Product: https://ffmpeg.org/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.videolan.org

Timelineinfo

10/29/2013 🔍
01/18/2014 +81 days 🔍
01/18/2014 +0 days 🔍
01/31/2014 +13 days 🔍
04/18/2019 +1903 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: h264: prevent two matching fields from being both a short/long ref combination
Researcher: Mateusz Jurczyk, Gynvael Coldwind
Organization: Google Security Team
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-12097
OSVDB: 102674

See also: 🔍

Entryinfo

Created: 01/31/2014 10:03
Updated: 04/18/2019 10:43
Changes: 01/31/2014 10:03 (51), 04/18/2019 10:43 (2)
Complete: 🔍
Cache ID: 216:C32:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.