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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Check for the version of the exim package
Detailed Explanation for this Vulnerability Assessment
The remote host is missing the patch for the advisory FEDORA-2005-001 (exim).
Exim is a mail transport agent (MTA) developed at the University of
Cambridge for use on Unix systems connected to the Internet. In style
it is similar to Smail 3, but its facilities are more extensive, and
in particular it has options for verifying incoming sender and
recipient addresses, for refusing mail from specified hosts, networks,
or senders, and for controlling mail relaying. Exim is in production
use at quite a few sites, some of which move hundreds of thousands of
messages per day.
Exiscan is compiled in to permit inbuilt scanning capability. See
This erratum fixes two relatively minor security issues which were
in Exim in the last few weeks. The Common Vulnerabilities and
project (cve.mitre.org) has assigned the names CVE-2005-0021 and
to these, respectively.
1. The function host_aton() can overflow a buffer if it is presented
illegal IPv6 address that has more than 8 components.
2. The second report described a buffer overflow in the function
spa_base64_to_bits(), which is part of the code for SPA
code originated in the Samba project. The overflow can be exploited
you are using SPA authentication.
Solution : http://www.fedoranews.org/blog/index.php?p=252
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Tenable Network Security
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