FreeRADIUS: Arbitrary code execution

Background

FreeRADIUS is an open source RADIUS authentication server.

Description

Large passwords can trigger a stack-based buffer overflow in FreeRADIUS’s rlm_pap module when authenticating against an LDAP server.

Impact

An authenticated user could set a specially crafted long password, possibly leading to arbitrary code execution or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All FreeRADIUS users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-dialup/freeradius-2.2.5"