VDB-216444 · CVE-2022-47629 · DLA 3248-1

Libksba up to 1.6.2 CRL Signature Parser integer overflow

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.
7.5	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in Libksba up to 1.6.2. Affected is an unknown code of the component CRL Signature Parser. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Libksba before 1.6.3 is prone to an integer overflow vulnerability in the CRL signature parser.

The weakness was shared 12/21/2022. The advisory is shared for download at dev.gnupg.org. This vulnerability is traded as CVE-2022-47629 since 12/20/2022. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.6.3 eliminates this vulnerability. Applying the patch f61a5ea4e0f6a80fd4b28ef0174bee77793cf070 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

Name

Libksba

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.5

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libksba 1.6.3
Patch: f61a5ea4e0f6a80fd4b28ef0174bee77793cf070

Timelineinfo

12/20/2022 🔍
12/21/2022 +1 days 🔍
12/21/2022 +0 days 🔍
01/21/2023 +31 days 🔍

Sourcesinfo

Advisory: DLA 3248-1
Status: Confirmed

CVE: CVE-2022-47629 (🔍)

Entryinfo

Created: 12/21/2022 09:36
Updated: 01/21/2023 14:47
Changes: 12/21/2022 09:36 (40), 01/21/2023 14:44 (1), 01/21/2023 14:47 (11)
Complete: 🔍