VDB-182953 · CVE-2020-20892 · ID 8265

FFmpeg 4.2.1 vf_lenscorrection.c filter_frame divide by zero

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.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in FFmpeg 4.2.1. Affected by this issue is the function filter_frame of the file libavfilter/vf_lenscorrection.c. This manipulation causes divide by zero. This vulnerability appears as CVE-2020-20892. The attack may be initiated remotely. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as problematic was found in FFmpeg 4.2.1 (Multimedia Processing Software). Affected by this vulnerability is the function filter_frame of the file libavfilter/vf_lenscorrection.c. The manipulation with an unknown input leads to a divide by zero vulnerability. The CWE definition for the vulnerability is CWE-369. The product divides a value by zero. As an impact it is known to affect availability.

The weakness was presented 09/20/2021. The advisory is shared at trac.ffmpeg.org. This vulnerability is known as CVE-2020-20892 since 08/13/2020. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Applying the patch 19587c9332f5be4f6bc6d7b2b8ef3fd21dfeaa01 is able to eliminate this problem. The bugfix is ready for download at git.videolan.org.

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

Productinfo

Type

Multimedia Processing Software

Name

FFmpeg

Version

4.2.1

License

open-source

Website

Product: https://ffmpeg.org/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Divide by zero
CWE: CWE-369 / CWE-404
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
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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 19587c9332f5be4f6bc6d7b2b8ef3fd21dfeaa01

Timelineinfo

08/13/2020 🔍
09/20/2021 +403 days 🔍
09/20/2021 +0 days 🔍
09/29/2021 +9 days 🔍

Sourcesinfo

Product: ffmpeg.org

Advisory: 8265
Status: Confirmed

CVE: CVE-2020-20892 (🔍)
GCVE (CVE): GCVE-0-2020-20892
GCVE (VulDB): GCVE-100-182953

Entryinfo

Created: 09/20/2021 21:18
Updated: 09/29/2021 10:01
Changes: 09/20/2021 21:18 (41), 09/29/2021 09:58 (2), 09/29/2021 10:01 (18)
Complete: 🔍
Cache ID: 216::103