Heartbeat: Insecure temporary file creation — GLSA 200508-05

Heartbeat is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.

Affected Packages

sys-cluster/heartbeat on all architectures
Affected versions < 1.2.3-r1
Unaffected versions >= 1.2.3-r1

Background

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

Description

Eric Romang has discovered that Heartbeat insecurely creates temporary files with predictable filenames.

Impact

A local attacker could create symbolic links in the temporary file directory, pointing to a valid file somewhere on the filesystem. When a vulnerable script is executed, this could lead to the file being overwritten with the rights of the user running the affected application.

Workaround

There is no known workaround at this time.

Resolution

All Heartbeat users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=sys-cluster/heartbeat-1.2.3-r1"

References

Release Date
August 07, 2005

Latest Revision
August 07, 2005: 01

Severity
normal

Exploitable
local

Bugzilla entries