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Heartbeat: Insecure temporary file creation


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200508-05 / Heartbeat
Release Date August 07, 2005
Latest Revision August 07, 2005: 01
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
sys-cluster/heartbeat < 1.2.3-r1 >= 1.2.3-r1 All supported architectures

Related bugreports: #97175


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

2.  Impact Information


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


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


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.

3.  Resolution Information


There is no known workaround at this time.


All Heartbeat users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4.  References


Page updated August 07, 2005

Summary: This is a Gentoo Linux Security Advisory

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