CVE-2013-0281

First published: Fri Jan 04 2013(Updated: )

A denial of service flaw was found in the way Pacemaker, an advanced, scalable high-availability cluster resource manager for Linux-HA (Heartbeat) and/or Corosync, performed authentication and processing of remote connections in certain circumstances. In general Pacemaker used a blocking socket (without a timeout) to wait for authentication credentials to arrive. When Pacemaker was configured to allow remote Cluster Information Base (CIB) cluster's configuration / cluster's resources management, a remote attacker could use this flaw to cause Pacemaker to block indefinitely (preventing it from serving another requests). Important Note: In the default configuration of Pacemaker in Red Hat Enterprise Linux 6 the remote CIB management feature / functionality is turned off.

Credit: secalert@redhat.com

Affected Software	Affected Version	How to fix
Redhat Enterprise Linux	=6.0
Clusterlabs Pacemaker	=1.1.10

Remedy

https://github.com/ClusterLabs/pacemaker/commit/564f7cc2a51dcd2f28ab12a13394f31be5aa3c93

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