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Vulnerability record · CVE-2022-1343 · published 3 May 2022

CVE-2022-1343: Openssl improper certificate validation vulnerability

OOpenssl · Openssl

The function `OCSP_basic_verify` verifies the signer certificate on an OCSP response. In the case where the (non-default) flag OCSP_NOCHECKS is used then the response will be positive (meaning a successful verification) even in the case where the response signing certificate fails to verify. It is anticipated that most users of `OCSP_basic_verify` will not use the OCSP_NOCHECKS flag. In this case the `OCSP_basic_verify` function will return a negative value (indicating a fatal error) in the case of a certificate verification failure. The normal expected return value in this case would be 0. This issue also impacts the command line OpenSSL "ocsp" application. When verifying an ocsp response with the "-no_cert_checks" option the command line application will report that the verification is successful even though it has in fact failed. In this case the incorrect successful response will also be accompanied by error messages showing the failure and contradicting the apparently successful result. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).

5.3 CVSS 3.1 Medium EPSS 1.2% · top 32.1% CWE-295 · Improper certificate validation
5.3CVSS 3.1 base score, v2 4.3
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
26Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

The function `OCSP_basic_verify` verifies the signer certificate on an OCSP response. In the case where the (non-default) flag OCSP_NOCHECKS is used then the response will be positive (meaning a successful verification) even in the case where the response signing certificate fails to verify. It is anticipated that most users of `OCSP_basic_verify` will not use the OCSP_NOCHECKS flag. In this case the `OCSP_basic_verify` function will return a negative value (indicating a fatal error) in the case of a certificate verification failure. The normal expected return value in this case would be 0. This issue also impacts the command line OpenSSL "ocsp" application. When verifying an ocsp response with the "-no_cert_checks" option the command line application will report that the verification is successful even though it has in fact failed. In this case the incorrect successful response will also be accompanied by error messages showing the failure and contradicting the apparently successful result. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

26 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-953464.pdf
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2eda98790c5c2741d76d23cc1e74b0dc4f4b391a
https://security.netapp.com/advisory/ntap-20220602-0009/ Third Party Advisory
https://www.openssl.org/news/secadv/20220503.txt Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-953464.pdf
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2eda98790c5c2741d76d23cc1e74b0dc4f4b391a
https://security.netapp.com/advisory/ntap-20220602-0009/ Third Party Advisory
https://www.openssl.org/news/secadv/20220503.txt Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-1343), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.