<p>Upgrade <code>Debian:11</code> <code>openssl</code> to version 1.1.1n-0+deb11u5 or higher.</p>

Improper Certificate Validation Affecting openssl package, versions <1.1.1n-0+deb11u5

Threat Intelligence

0.3% (70^th percentile)

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Snyk ID SNYK-DEBIAN11-OPENSSL-3368735
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 Debian:11 openssl to version 1.1.1n-0+deb11u5 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 Debian. See How to fix? for Debian:11 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' argument to the command line utilities or by calling the X509_VERIFY_PARAM_set1_policies()' function.

References

CVSS Scores

version 3.1

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

Improper Certificate Validation Affecting openssl package, versions <1.1.1n-0+deb11u5

Severity

Snyk's Security Team recommends NVD's CVSS assessment