GLSA 200508-05: Heartbeat: Insecure temporary file creation

http://security.gentoo.org/

Severity:	normal
Title:	Heartbeat: Insecure temporary file creation
Date:	08/07/2005
Bugs:	#97175
ID:	200508-05

Synopsis

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

Background

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

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
sys-cluster/heartbeat	< 1.2.3-r1	>= 1.2.3-r1	All supported architectures

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

CAN-2005-2231

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200508-05.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.