Improper Certificate Validation Affecting openssl package, versions <1.0.2g-1ubuntu4.20+esm7


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.47% (76th percentile)

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  • Snyk IDSNYK-UBUNTU1604-OPENSSL-5296094
  • published30 Mar 2023
  • disclosed28 Mar 2023

Introduced: 28 Mar 2023

CVE-2023-0465  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 openssl to version 1.0.2g-1ubuntu4.20+esm7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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&#39; argument to the command line utilities or by calling the X509_VERIFY_PARAM_set1_policies()' function.

CVSS Scores

version 3.1