Description
The _gnutls_x509_oid2mac_algorithm function in lib/gnutls_algorithms.c in GnuTLS before 1.4.2 allows remote attackers to cause a denial of service (crash) via a crafted X.509 certificate that uses a hash algorithm that is not supported by GnuTLS, which triggers a NULL pointer dereference.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | gnutls +2 | 1.4.1-7.el5_8.1 | RHBA-2012:0319 |
Advisories 1
- RHBA-2012:0319 Red Hat Bug Fix Advisory: gnutls bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026