Linux Kernel up to 5.14.13 Firewire Subsystem firedtv-avc.c avc_ca_pmt buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

A vulnerability was found in Linux Kernel up to 5.14.13 (Operating System). It has been declared as critical. This vulnerability affects the function avc_ca_pmt of the file drivers/media/firewire/firedtv-avc.c of the component Firewire Subsystem. 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 confidentiality, integrity, and availability.

The weakness was presented 10/20/2021. The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2021-42739 since 10/20/2021. There are known technical details, but no exploit is available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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: Buffer overflow
CWE: CWE-120 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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: git.kernel.org

Timelineinfo

10/20/2021 🔍
10/20/2021 +0 days 🔍
10/20/2021 +0 days 🔍
10/28/2021 +8 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-42739 (🔍)

Entryinfo

Created: 10/20/2021 15:22
Updated: 10/28/2021 02:59
Changes: 10/20/2021 15:22 (43), 10/28/2021 02:59 (1)
Complete: 🔍

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