[ GLSA 200608-23 ] Heartbeat: Denial of Service

[GLSA]

Gentoo Linux Security Advisory

Title: Heartbeat: Denial of Service (GLSA 200608-23)
Severity: normal
Exploitable: remote
Date: August 24, 2006
Updated: September 22, 2006
Bug(s): #141894
ID: 200608-23

Synopsis

Heartbeat is vulnerable to a Denial of Service which can be triggered by a remote attacker without authentication.

Background

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

Affected Packages

Package: sys-cluster/heartbeat
Vulnerable: < 2.0.7
Unaffected: >= 2.0.7
Unaffected: >= 1.2.5 < 1.2.6
Architectures: All supported architectures


Description

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).

Impact

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

Workaround

There is no known workaround at this time.

Resolution

All Heartbeat users should upgrade to the latest version: