Courier Mail Server < 0.50.1 DNS SPF Record Lookup Failure Memory Corruption DoS

This script is Copyright (C) 2005-2013 Tenable Network Security, Inc.

Synopsis :

The remote mail server is vulnerable to a denial of service attack.

Description :

The remote host is running Courier Mail Server, an open source mail
server for Linux and Unix.

According to its banner, the installed version of Courier is prone to
a remote denial of service vulnerability triggered when doing Sender
Policy Framework (SPF) data lookups. To exploit this flaw, an
attacker would need to control a DNS server and return malicious SPF
records in response to queries from the affected application.

Solution :

Upgrade to Courier version 0.50.1 or later.

Risk factor :

Low / CVSS Base Score : 2.6
CVSS Temporal Score : 1.9
Public Exploit Available : false

Family: SMTP problems

Nessus Plugin ID: 18620 (courier_0501.nasl)

Bugtraq ID: 14135

CVE ID: CVE-2005-2151