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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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Libgcrypt up to 1.9.0. This issue affects the function _gcry_md_block_write of the file cipher/hash-common.c. Such manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2021-3345. No exploit is available. The affected component should be upgraded.

Detailsinfo

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.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 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 (🔍)
GCVE (CVE): GCVE-0-2021-3345
GCVE (VulDB): GCVE-100-168920

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: 🔍
Cache ID: 216::103

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