OpenBSD/LibreSSL x509/x509_verify.c x509_verify_ctx_add_chain certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in OpenBSD and LibreSSL. This affects the function x509_verify_ctx_add_chain of the file x509/x509_verify.c. This manipulation causes certificate validation. This vulnerability is tracked as CVE-2022-48437. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in OpenBSD and LibreSSL (Operating System) (affected version unknown). Affected by this vulnerability is the function x509_verify_ctx_add_chain of the file x509/x509_verify.c. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in x509/x509_verify.c in LibreSSL before 3.6.1, and in OpenBSD before 7.2 errata 001. x509_verify_ctx_add_chain does not store errors that occur during leaf certificate verification, and therefore an incorrect error is returned. This behavior occurs when there is an installed verification callback that instructs the verifier to continue upon detecting an invalid certificate.

The weakness was disclosed 04/12/2023 as 4f94258c65a918ee3d8670e93916d15bf879e6ec. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2022-48437. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability. Applying the patch 4f94258c65a918ee3d8670e93916d15bf879e6ec is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: 🔍

Patch: 4f94258c65a918ee3d8670e93916d15bf879e6ec

Timelineinfo

04/12/2023 🔍
04/12/2023 +0 days 🔍
04/12/2023 +0 days 🔍
02/10/2025 +670 days 🔍

Sourcesinfo

Advisory: 4f94258c65a918ee3d8670e93916d15bf879e6ec
Status: Confirmed

CVE: CVE-2022-48437 (🔍)
GCVE (CVE): GCVE-0-2022-48437
GCVE (VulDB): GCVE-100-225667

Entryinfo

Created: 04/12/2023 07:27
Updated: 02/10/2025 21:51
Changes: 04/12/2023 07:27 (41), 04/30/2023 08:14 (1), 02/10/2025 21:51 (25)
Complete: 🔍
Cache ID: 216::103

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