BIND: Handling responses containing a DNAME answer can lead to an assertion failure (CVE-2016-8864)

This document (7018224) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)
SUSE Linux Enterprise Server 12 GA LTSS (SLES 12 GA LTSS)

SUSE Linux Enterprise Server 11 Service Pack 4 (SLES 11 SP4)
SUSE Linux Enterprise Server 11 Service Pack 3 LTSS (SLES 11 SP3 LTSS)
SUSE Linux Enterprise Server 11 Service Pack 2 LTSS (SLES 11 SP2 LTSS)

Situation

On Tuesday, 1st of November, a high impact vulnerability in the bind service was made public by the ISC.

The problem is basically a remote Denial of Service (DoS) attack when bind is handling special DNAME response records. This vulnerability can potentially be exploited against all BIND 9 servers.

All versions prior to the current BIND release are affected.

Further details can be found here.

Resolution

SUSE is aware of this and will release patches during the next hours.

SLES 12 SP1

bind-9.9.9P1-49.1 was released 2nd of November 2016

SLES 12 GA LTSS

bind-9.9.9P1-28.23.1 was released 2nd of November 2016

SUSE recommends to patch all affected servers as soon as possible.

Cause

Additional Information

CVE-2016-8864

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.