Openswan: User-assisted execution of arbitrary code

Background

Openswan is an implementation of IPsec for Linux.

Description

A buffer overflow flaw has been discovered in Openswan when using Opportunistic Encryption.

Impact

A remote attacker could send a specially crafted DNS TXT record, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All Openswan users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/openswan-2.6.39"