VDB-180529 · CVE-2020-21697 · GCVE-0-2020-21697

FFmpeg 4.2 AVI File libavformat/mpegenc.c mpeg_mux_write_packet 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.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in FFmpeg 4.2. This affects the function mpeg_mux_write_packet of the file libavformat/mpegenc.c of the component AVI File Handler. This manipulation causes use after free. The identification of this vulnerability is CVE-2020-21697. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in FFmpeg 4.2 (Multimedia Processing Software). It has been declared as problematic. Affected by this vulnerability is the function mpeg_mux_write_packet of the file libavformat/mpegenc.c of the component AVI File Handler. 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 availability.

The weakness was shared 08/11/2021. The advisory is shared at trac.ffmpeg.org. This vulnerability is known as CVE-2020-21697. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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

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: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

EPSS Score: 🔍
EPSS Percentile: 🔍

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/13/2020 🔍
08/11/2021 +363 days 🔍
08/11/2021 +0 days 🔍
08/15/2021 +4 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: trac.ffmpeg.org
Status: Confirmed

CVE: CVE-2020-21697 (🔍)
GCVE (CVE): GCVE-0-2020-21697
GCVE (VulDB): GCVE-100-180529

Entryinfo

Created: 08/11/2021 11:25
Updated: 08/15/2021 14:36
Changes: 08/11/2021 11:25 (38), 08/15/2021 14:36 (2)
Complete: 🔍
Cache ID: 216::103