Squid proxy up to 2.5 NTLM authentication ntlm_fetch_string Denial of Service 1.1
 
Plugin ID203
Plugin nameSquid proxy up to 2.5 NTLM authentication ntlm_fetch_string Denial of Service
Plugin filenameSquid proxy up to 2.5 NTLM authentication ntlm_fetch_string Denial of Service.plugin
Plugin filesize3896 bytes
Plugin familyFirewalls
Plugin created nameMarc Ruef
Plugin created emailmarc dot ruef at computec dot ch
Plugin created webhttp://www.computec.ch
Plugin created companycomputec.ch
Plugin created date2004/09/10
Plugin updated nameMarc Ruef
Plugin updated emailmarc dot ruef at computec dot ch
Plugin updated webhttp://www.computec.ch
Plugin updated companycomputec.ch
Plugin updated date2004/11/13
Plugin version1.1
Plugin changelogCorrected the plugin structure and added the accuracy values in 1.1
Plugin protocoltcp
Plugin port3128
Plugin procedure detectionopen|send GET http://www.computec.ch HTTP/1.0\nHost: http://www.computec.ch\n\n|sleep|close|pattern_exists *Server Squid/[0-1].* OR *Server Squid/2.[0-5]*
Plugin detection accuracy80
Plugin commentCheck is inspired by the Nessus plugin (see Nessus ID listed in the sources). Perhaps the Squid proxy is running on another port (e.g. 8080).
Bug published nameMarco Ortisi
Bug published webhttp://www.squid-cache.org
Bug published companySquid Team
Bug published date2004/06/09
Bug advisoryhttp://www.squid-cache.org/bugs/show_bug.cgi?id=1045
Bug affectedSquid up to 2.5
Bug not affectedSquid without NTLM authentication, Squid 2.5 and newer or other proxy solutions
Bug vulnerability classBuffer Overflow
Bug descriptionThe remote host seems to be running a Squid proxy. Squid up to 2.5 has a denial of service vulnerability if the NTLM authentication string is too long. An attacker may crash the remote proxy or be able to run arbitrary code in the context of the server.
Bug solutionThe server should be deactivated or de-installed if not necessary. If this is not possible, you should upgrade the software to the latest version and do not use NTLM authentication. To make it harder to find the server the daemon could be configured to listen at another port (e.g. 8099). Try to prevent unwanted connection attempts by filtering traffic with firewalling. Alternation of the application banner can confuse an attacker and let him determine the wrong software.
Bug fixing timeApprox. 50 minutes
Bug exploit availabilityYes
Bug exploit urlhttp://www.securityfocus.com/bid/10500/exploit/
Bug remoteYes
Bug localYes
Bug severityMedium
Bug popularity6
Bug simplicity7
Bug impact9
Bug risk7
Bug Nessus riskHigh
Bug check toolsNessus is able to do the same check more accurate.
Source CVECAN-2004-0541
Source SecurityFocus BID10500
Source Secunia ID12444
Source Nessus ID12294
Source LiteratureHacking Exposed: Network Security Secrets & Solutions, Stuart McClure, Joel Scambray and George Kurtz, February 25, 2003, 4th Edition, McGraw-Hill Osborne Media, ISBN 0072227427
Source Misc.http://www1.uk.squid-cache.org/squid/Versions/v2/2.5/bugs/squid-2.5.STABLE6-ntlm_fetch_string.patch

This file was generated by the Attack Tool Kit (ATK), the open-sourced security scanner and exploiting framework.