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Fedora Core 3 2005-001: exim

Vulnerability Assessment Summary 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 http://duncanthrax.net/exiscan-acl/ Update Information: This erratum fixes two relatively minor security issues which were discovered in Exim in the last few weeks. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2005-0021 and CVE-2005-0022 to these, respectively. 1. The function host_aton() can overflow a buffer if it is presented with an 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 authentication. This code originated in the Samba project. The overflow can be exploited only if 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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