| Name | CVE-2023-0464 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3449-1, DSA-5417-1 |
| Debian Bugs | 1034720 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openssl (PTS) | buster | 1.1.1n-0+deb10u3 | vulnerable |
| buster (security) | 1.1.1n-0+deb10u6 | fixed |
| bullseye | 1.1.1w-0+deb11u1 | fixed |
| bullseye (security) | 1.1.1n-0+deb11u5 | fixed |
| bookworm, bookworm (security) | 3.0.11-1~deb12u2 | fixed |
| sid, trixie | 3.2.1-3 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://www.openssl.org/news/secadv/20230322.txt
https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=959c59c7a0164117e7f8366466a32bb1f8d77ff1 (openssl-3.0)
https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=879f7080d7e141f415c79eaa3a8ac4a3dad0348b (OpenSSL_1_1_1-stable)