<plugin_id>80</plugin_id>
<plugin_name>Exim 3.0 to 4.20 EHLO/HELO remote headp corruption</plugin_name>
<plugin_family>SMTP</plugin_family>
<plugin_created_date>2004/03/23</plugin_created_date>
<plugin_created_name>Marc Ruef</plugin_created_name>
<plugin_created_email>marc dot ruef at computec dot ch</plugin_created_email>
<plugin_created_web>http://www.computec.ch</plugin_created_web>
<plugin_created_company>computec.ch</plugin_created_company>
<plugin_updated_name>Marc Ruef</plugin_updated_name>
<plugin_updated_email>marc dot ruef at computec dot ch</plugin_updated_email>
<plugin_updated_web>http://www.computec.ch</plugin_updated_web>
<plugin_updated_company>computec.ch</plugin_updated_company>
<plugin_updated_date>2004/11/13</plugin_updated_date>
<plugin_version>1.2</plugin_version>
<plugin_changelog>Corrected the plugin structure and added the accuracy values in 1.2</plugin_changelog>
<plugin_protocol>tcp</plugin_protocol>
<plugin_port>25</plugin_port>
<plugin_procedure_detection>open|sleep|close|pattern_exists 220 *Exim 3.* OR 220 *Exim 4.10* OR 220 *Exim 4.20*</plugin_procedure_detection>
<plugin_detection_accuracy>80</plugin_detection_accuracy>
<plugin_comment>This plugin was written with the ATK Attack Editor.</plugin_comment>
<bug_advisory>http://www.securityfocus.com/archive/1/335790</bug_advisory>
<bug_affected>Exim MTA 3.0 to 4.20</bug_affected>
<bug_not_affected>Exim MTA 4.20 and newer</bug_not_affected>
<bug_vulnerability_class>Buffer Overflow</bug_vulnerability_class>
<bug_description>Exim is an well-known open-source Mail Transfer Agent (MTA) for Unix systems. Due to insufficient bounds checking when handling user-supplied SMTP EHLO/HELO data a heap corruption can occur. It may be possible to overrun the bounds of a heap memory buffer and run arbritrary code with server privileges. It may also possible to cause a denial of service.</bug_description>
<bug_solution>Patches have been released for Exim version 3.36 and 4.20. The vendor has reported that these patches will likely work on earlier versions as well. Users are advised to upgrade as soon as possible to version 4.21 or newer.</bug_solution>
<bug_fixing_time>1 hour</bug_fixing_time>
<bug_exploit_availability>Yes</bug_exploit_availability>
<bug_exploit_url>http://www.securityfocus.com/bid/8518/exploit/</bug_exploit_url>
<bug_remote>Yes</bug_remote>
<bug_local>Yes</bug_local>
<bug_severity>High</bug_severity>
<bug_popularity>8</bug_popularity>
<bug_simplicity>8</bug_simplicity>
<bug_impact>9</bug_impact>
<bug_risk>8</bug_risk>
<source_cve>CAN-2003-0743</source_cve>
<source_securityfocus_bid>8518</source_securityfocus_bid>
<source_literature>Hacking Exposed: Network Security Secrets & Solutions, Stuart McClure, Joel Scambray and George Kurtz, February 25, 2003, 4th Edition, McGraw-Hill Osborne Media, ISBN 0072227427</source_literature>
<source_misc>http://www.computec.ch</source_misc>