[ GLSA 200508-05 ] Heartbeat: Insecure temporary file creation

[GLSA]

Gentoo Linux Security Advisory

Title: Heartbeat: Insecure temporary file creation (GLSA 200508-05)
Severity: normal
Exploitable: local
Date: August 07, 2005
Bug(s): #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: sys-cluster/heartbeat
Vulnerable: < 1.2.3-r1
Unaffected: >= 1.2.3-r1
Architectures: 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: