FireHOL: Insecure temporary file creation

Background

FireHOL is an iptables rules generator.

Description

FireHOL insecurely creates temporary files with predictable names.

Impact

A local attacker could create malicious symbolic links to arbitrary system files. When FireHOL is executed, this could lead to these files being overwritten with the rights of the user launching FireHOL, usually the root user.

Workaround

There is no known workaround at this time.

Resolution

All FireHOL users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-firewall/firehol-1.224"