Keepalived: Denial of Service

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
sys-cluster/keepalived	< 1.2.2-r3	>= 1.2.2-r3	All supported architectures

Related bugreports: #371469

Keepalived uses world-writable PID files, allowing a local attacker to kill arbitrary processes.

2. Impact Information

Keepalived is a strong & robust keepalive facility to the Linux Virtual Server project.

The "pidfile_write()" function in pidfile.c in Keepalived writes PID files with insecure permissions.

A local attacker may be able to cause a Denial of Service of arbitrary processes.

3. Resolution Information

There is no known workaround at this time.

All Keepalived users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-cluster/keepalived-1.2.2-r3"

4. References

Page updated July 09, 2012

Summary: This is a Gentoo Linux Security Advisory

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