RHSA-2016:0012: Moderate: gnutls security update
The GnuTLS library provides support for cryptographic algorithms and forprotocols such as Transport Layer Security (TLS).A flaw was found in the way TLS 1.2 could use the MD5 hash function forsigning ServerKeyExchange and Client Authentication packets during a TLShandshake. A man-in-the-middle attacker able to force a TLS connection touse the MD5 hash function could use this flaw to conduct collision attacksto impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575)All gnutls users are advised to upgrade to these updated packages, whichcontain a backported patch to correct this issue. For the update to takeeffect, all applications linked to the GnuTLS library must be restarted.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2016:0012?
The severity of RHSA-2016:0012 is classified as moderate.
How do I fix RHSA-2016:0012?
To fix RHSA-2016:0012, update the GnuTLS library to version 3.3.8-14.el7_2 or 2.8.5-19.el6_7 depending on your system.
What is the vulnerability in RHSA-2016:0012?
RHSA-2016:0012 addresses a flaw in the GnuTLS library related to the use of the MD5 hash function in TLS 1.2 communications.
Which packages are affected by RHSA-2016:0012?
The affected packages include gnutls, gnutls-dane, gnutls-debuginfo, gnutls-devel, and gnutls-utils.
Is RHSA-2016:0012 applicable to both el6 and el7 versions?
Yes, RHSA-2016:0012 is applicable to both el6 and el7 versions of affected packages.