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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 fetchmail packages
Detailed Explanation for this Vulnerability Assessment
Updated fetchmail packages that fix two security issues are now available.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
Fetchmail is a remote mail retrieval and forwarding utility.
A denial of service flaw was found when Fetchmail was run in multidrop
mode. A malicious mail server could send a message without headers which
would cause Fetchmail to crash (CVE-2005-4348). This issue did not affect
the version of Fetchmail shipped with Red Hat Enterprise Linux 2.1 or 3.
A flaw was found in the way Fetchmail used TLS encryption to connect to
remote hosts. Fetchmail provided no way to enforce the use of TLS
encryption and would not authenticate POP3 protocol connections properly
(CVE-2006-5867). This update corrects this issue by enforcing TLS
encryption when the "sslproto" configuration directive is set to "tls1".
Users of Fetchmail should update to these packages, which contain
backported patches to correct these issues.
Note: This update may break configurations which assumed that Fetchmail
would use plain-text authentication if TLS encryption is not supported by
the POP3 server even if the "sslproto" directive is set to "tls1". If you
are using a custom configuration that depended on this behavior you will
need to modify your configuration appropriately after installing this update.
Solution : http://rhn.redhat.com/errata/RHSA-2007-0018.html
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2007 Tenable Network Security
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