NULL Pointer Dereference Affecting openssl-libs package, versions <1:3.0.1-47.el9_1
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-ALMALINUX9-OPENSSLLIBS-5607622
- published 28 May 2023
- disclosed 28 Feb 2023
Introduced: 28 Feb 2023
CVE-2023-0401 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 openssl-libs to version 1:3.0.1-47.el9_1 or higher.
This issue was patched in ALSA-2023:0946.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl-libs package and not the openssl-libs package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 relevant fixed versions and status.
A NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. In case the hash algorithm used for the signature is known to the OpenSSL library but the implementation of the hash algorithm is not available the digest initialization will fail. There is a missing check for the return value from the initialization function which later leads to invalid usage of the digest API most likely leading to a crash.
The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider.
PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The TLS implementation in OpenSSL does not call these functions however third party applications would be affected if they call these functions to verify signatures on untrusted data.
References
- https://errata.almalinux.org/9/ALSA-2023-0946.html
- https://access.redhat.com/security/cve/CVE-2023-0401
- https://access.redhat.com/errata/RHSA-2023:0946
- https://www.openssl.org/news/secadv/20230207.txt
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=d3b6dfd70db844c4499bec6ad6601623a565e674
- https://security.gentoo.org/glsa/202402-08