Heartbeat: Denial of Service

Heartbeat: Denial of Service Heartbeat is vulnerable to a Denial of Service which can be triggered by a remote attacker without authentication. heartbeat 2006-08-24 2006-09-22 141894 remote 2.0.7 1.2.5 2.0.7

Heartbeat is a component of the High-Availability Linux project. It is used to perform death-of-node detection, communications and cluster management.

Yan Rong Ge discovered that the peel_netstring() function in cl_netstring.c does not validate the "length" parameter of user input, which can lead to an out-of-bounds memory access when processing certain Heartbeat messages (CVE-2006-3121). Furthermore an unspecified local DoS issue was fixed (CVE-2006-3815).

By sending a malicious UDP Heartbeat message, even before authentication, a remote attacker can crash the master control process of the cluster.

There is no known workaround at this time.

All Heartbeat users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose sys-cluster/heartbeat

CVE-2006-3121 CVE-2006-3815 jaervosz falco falco