Arch Linux Security Advisory ASA-201706-12
=========================================
Severity: Medium
Date    : 2017-06-13
CVE-ID  : CVE-2017-7507
Package : gnutls
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-294

Summary
======
The package gnutls before version 3.5.13-1 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 3.5.13-1.

# pacman -Syu "gnutls>=3.5.13-1"

The problem has been fixed upstream in version 3.5.13.

Workaround
=========
None.

Description
==========
A security issue has been found in GnuTLS < 3.5.13, where decoding a
status request TLS extension that has a non-empty responder IDs list
could lead to a crash due to a null pointer dereference.

Impact
=====
A remote attacker can crash a vulnerable TLS server by sending a
crafted status_request extension in a ClientHello message.

References
=========
https://www.gnutls.org/security.html#GNUTLS-SA-2017-4
https://bugzilla.redhat.com/show_bug.cgi?id=1454621
https://security.archlinux.org/CVE-2017-7507