OpenBSD/LibreSSL Certificate Chain x509/x509_verify.c improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD and LibreSSL. It has been declared as critical. This vulnerability affects unknown code of the file x509/x509_verify.c of the component Certificate Chain Handler. Such manipulation leads to improper authentication. This vulnerability is traded as CVE-2021-46880. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OpenBSD and LibreSSL (Operating System) (version now known). Affected by this issue is some unknown processing of the file x509/x509_verify.c of the component Certificate Chain Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. CVE summarizes:

x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes discarded.

The weakness was shared 04/15/2023 as 3f851282810fa0ab4b90b3b1ecec2e8717ef16f8. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-46880 since 04/14/2023. There are known technical details, but no exploit is available.

Upgrading eliminates this vulnerability. Applying the patch 3f851282810fa0ab4b90b3b1ecec2e8717ef16f8 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.

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

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: 3f851282810fa0ab4b90b3b1ecec2e8717ef16f8

Timelineinfo

04/14/2023 🔍
04/15/2023 +1 days 🔍
04/15/2023 +0 days 🔍
04/15/2023 +0 days 🔍

Sourcesinfo

Advisory: 3f851282810fa0ab4b90b3b1ecec2e8717ef16f8
Status: Confirmed

CVE: CVE-2021-46880 (🔍)
GCVE (CVE): GCVE-0-2021-46880
GCVE (VulDB): GCVE-100-226064

Entryinfo

Created: 04/15/2023 07:51
Changes: 04/15/2023 07:51 (42)
Complete: 🔍
Cache ID: 216::103

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