Heartbeat is vulnerable to a Denial of Service which can be triggered by a remote attacker without authentication.
|Package||sys-cluster/heartbeat on all architectures|
|Affected versions||< 2.0.7|
|Unaffected versions||>= 2.0.7, revision >= 1.2.5|
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
August 24, 2006
September 22, 2006: 02