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Improper Certificate Validation Affecting openssl1.0 package, versions <1.0.2n-1ubuntu5.12

Severity

 Recommended
low

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.26% (67th percentile)

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  • Snyk ID SNYK-UBUNTU1804-OPENSSL10-3368852
  • published 23 Mar 2023
  • disclosed 22 Mar 2023
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Introduced: 22 Mar 2023

CVE-2023-0464 Open this link in a new tab
CWE-295 Open this link in a new tab

How to fix?

Upgrade Ubuntu:18.04 openssl1.0 to version 1.0.2n-1ubuntu5.12 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl1.0 package and not the openssl1.0 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A security vulnerability has been identified in all supported versions

of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems.

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
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NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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SUSE

5.3 medium
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Red Hat

5.9 medium