CVE-2023-0465
Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks.
Does this matter?
Lower severity and a low EPSS score (1.77%). Track it; it rarely justifies an emergency change on its own.
Description
Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent policy checking on the certificate altogether. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.77% probability · 78th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- openssl/openssl
- Source
- openssl-security@openssl.org
EPSS 1.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=10325176f3d3e98c6e2b3bf5ab1e3b334de6947aBroken Link
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=1dd43e0709fece299b15208f36cc7c76209ba0bbMailing List, Patch
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=b013765abfa80036dc779dd0e50602c57bb3bf95Mailing List, Patch
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=facfb1ab745646e97a1920977ae4a9965ea61d5cMailing List, Patch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html
- https://security.gentoo.org/glsa/202402-08
- https://security.netapp.com/advisory/ntap-20230414-0001/
- https://www.debian.org/security/2023/dsa-5417
- https://www.openssl.org/news/secadv/20230328.txtVendor Advisory
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=10325176f3d3e98c6e2b3bf5ab1e3b334de6947aBroken Link
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=1dd43e0709fece299b15208f36cc7c76209ba0bbMailing List, Patch
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=b013765abfa80036dc779dd0e50602c57bb3bf95Mailing List, Patch
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=facfb1ab745646e97a1920977ae4a9965ea61d5cMailing List, Patch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html
- https://security.gentoo.org/glsa/202402-08
- https://security.netapp.com/advisory/ntap-20230414-0001/
- https://www.debian.org/security/2023/dsa-5417
- https://www.openssl.org/news/secadv/20230328.txtVendor Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-337522.html
- https://cert-portal.siemens.com/productcert/html/ssa-341067.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-556635.html
- https://cert-portal.siemens.com/productcert/html/ssa-625862.html
- https://cert-portal.siemens.com/productcert/html/ssa-769027.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
- https://cert-portal.siemens.com/productcert/html/ssa-879734.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.