CVE-2023-0464
openssl - security update
Description
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.
How to fix CVE-2023-0464
To remediate CVE-2023-0464, upgrade the affected package to a fixed version below.
- —upgrade to 1.1.1t-r1 or later
- —upgrade to 3.0.8-r1 or later
- —upgrade to 1.1.1n-0+deb11u5 or later
- —upgrade to 1.1.1n-0+deb10u5 or later
- —upgrade to 1.1.1n-0+deb11u5 or later
Is CVE-2023-0464 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0, < 1.1.1t-r1
- from 0, < 3.0.8-r1
- from 0, < 1.1.1n-0+deb11u5
- from 0, < 1.1.1n-0+deb10u5
- from 0, < 1.1.1n-0+deb11u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |