5.3

CVE-2023-0465: Invalid certificate policies in leaf certificates are silently ignored

Modified
AliasesALPINE-CVE-2023-0465SUSE-SU-2023:1912-1SUSE-SU-2023:1960-1
Published 28-03-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-0465 is a medium (CVSS 5.3) Improper Certificate Validation vulnerability in openssl. EPSS estimates a 1.77% chance of exploitation in the next 30 days, higher than 78.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.77%
0%100%
Low · +0.19 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 20
DLA-3449-1DSA-5417-1MGASA-2023-0130OPENSUSE-SU-2024:12837-1OPENSUSE-SU-2024:12842-1OPENSUSE-SU-2024:12969-1

Timeline

  1. 28-03-2023
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

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 metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.77%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

Increase +0.19 pp

From 1.58% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard4 products
  • openssl< 3.1.0-r2
  • openssl-provider-fips< 3.0.9-r1
  • ruby-3.1All versions (No fix recorded)
  • ruby-3.2All versions (No fix recorded)
Suse4 products
  • compat-openssl098&distro=SUSE Linux Enterprise Module for Legacy 12< 0.9.8j-106.48.1
  • compat-openssl098&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP4< 0.9.8j-106.48.1
  • compat-openssl098&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5< 0.9.8j-106.48.1
  • openssl&distro=SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE< 0.9.8j-0.106.66.1
Ubuntu4 products
  • edk2All versions (No fix recorded) | < 2022.02-3ubuntu0.22.04.4
  • nodejsAll versions (No fix recorded)
  • openssl< 1.0.1f-1ubuntu2.27+esm7 | < 1.0.2g-1ubuntu4.20+esm7 | < 1.0.2g-1ubuntu4.fips.4.20.7 | All versions (No fix recorded) | < 1.1.1-1ubuntu2.1~18.04.22 | < 1.1.1-1ubuntu2.fips.2.1~18.04.22 | < 1.1.1f-1ubuntu2.18 | < 1.1.1f-1ubuntu2.fips.18 | < 3.0.2-0ubuntu1.9
  • openssl1.0< 1.0.2n-1ubuntu5.12
Alpine3 products
  • openssl≥ 1.0.2, < 1.1.1t-r2 | ≥ 1.0.2, < 3.0.8-r2 | ≥ 1.0.2, < 3.1.0-r2
  • openssl1.1-compat< 1.1.1t-r2
  • openssl3< 3.0.8-r2
Wolfi3 products
  • openssl< 3.1.0-r2
  • ruby-3.1All versions (No fix recorded)
  • ruby-3.2All versions (No fix recorded)
Debian1 product
  • openssl< 3.0.9-1
Openssl1 product
  • openssl≥ 1.0.2, < 1.0.2zh | ≥ 1.1.1, < 1.1.1u | ≥ 3.0.0, < 3.0.9 | ≥ 3.1.0, < 3.1.1

7 vendors · 20 products

References

29 links
Show all 29 references