FFmpeg 4.2.1 libavfilter/vf_avgblur.c filter_vertically_##name buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability was found in FFmpeg 4.2.1. It has been rated as critical. The impacted element is the function filter_vertically_##name of the file libavfilter/vf_avgblur.c. This manipulation causes buffer overflow. The identification of this vulnerability is CVE-2020-20895. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in FFmpeg 4.2.1 (Multimedia Processing Software). It has been declared as critical. Affected by this vulnerability is the function filter_vertically_##name of the file libavfilter/vf_avgblur.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability.

The weakness was shared 09/20/2021 as 8274. It is possible to read the advisory at trac.ffmpeg.org. This vulnerability is known as CVE-2020-20895 since 08/13/2020. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch f069a9c2a65bc20c3462127623127df6dfd06c5b is able to eliminate this problem. The bugfix is ready for download at git.ffmpeg.org.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: f069a9c2a65bc20c3462127623127df6dfd06c5b

Timelineinfo

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

Sourcesinfo

Product: ffmpeg.org

Advisory: 8274
Status: Confirmed

CVE: CVE-2020-20895 (🔍)
GCVE (CVE): GCVE-0-2020-20895
GCVE (VulDB): GCVE-100-182959

Entryinfo

Created: 09/20/2021 21:54
Updated: 09/29/2021 11:02
Changes: 09/20/2021 21:54 (42), 09/29/2021 10:57 (7), 09/29/2021 11:02 (1)
Complete: 🔍
Cache ID: 216::103

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