Libgcrypt up to 1.9.0 cipher/hash-common.c _gcry_md_block_write heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

A vulnerability was found in Libgcrypt up to 1.9.0. It has been rated as critical. Affected by this issue is the function _gcry_md_block_write of the file cipher/hash-common.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability.

The weakness was published 01/30/2021. The advisory is shared for download at bugs.gentoo.org. This vulnerability is handled as CVE-2021-3345. There are known technical details, but no exploit is available.

Upgrading to version 1.9.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.gnupg.org. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / 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: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libgcrypt 1.9.1
Patch: git.gnupg.org

Timelineinfo

01/29/2021 🔍
01/30/2021 +1 days 🔍
01/30/2021 +0 days 🔍
02/21/2021 +22 days 🔍

Sourcesinfo

Advisory: bugs.gentoo.org
Status: Confirmed

CVE: CVE-2021-3345 (🔍)

Entryinfo

Created: 01/30/2021 10:56
Updated: 02/21/2021 18:03
Changes: 01/30/2021 10:56 (39), 02/21/2021 17:58 (5), 02/21/2021 18:03 (18)
Complete: 🔍

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