RHSA-2016:0012: Moderate: gnutls security update

First published: Thu Jan 07 2016(Updated: )

The GnuTLS library provides support for cryptographic algorithms and for<br>protocols such as Transport Layer Security (TLS).<br>A flaw was found in the way TLS 1.2 could use the MD5 hash function for<br>signing ServerKeyExchange and Client Authentication packets during a TLS<br>handshake. A man-in-the-middle attacker able to force a TLS connection to<br>use the MD5 hash function could use this flaw to conduct collision attacks<br>to impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575)<br>All gnutls users are advised to upgrade to these updated packages, which<br>contain a backported patch to correct this issue. For the update to take<br>effect, all applications linked to the GnuTLS library must be restarted.<br>

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