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Category:   Application (Web Server/CGI)  >   Squid Vendors:   Squid-cache.org
Squid Infinite Loop in strListGetItem() Lets Remote Users Deny Service
SecurityTracker Alert ID:  1022757
SecurityTracker URL:  http://securitytracker.com/id/1022757
CVE Reference:   CVE-2009-2855   (Links to External Site)
Date:  Aug 20 2009
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2, 3
Description:   A vulnerability was reported in Squid. A remote user can cause denial of service conditions.

A remote user can send specially crafted HTTP header values that use a comma character as a delimiter to cause the strListGetItem() function in 'src/HttpHeaderTools.c' to enter an infinite loop and consume all available CPU resources.

Systems that have an 'external_acl_type', 'access_log_format', or 'external_refresh_check' configured using a delimiter that is not a comma are affected.

Bastian Blank reported this vulnerability.

Impact:   A remote user can the target service to enter an infinite loop and consume all available CPU resources.
Solution:   The vendor has issued a source code fix, available via the Bazaar repository (~squid/squid/squid3-trunk rev 9920).
Vendor URL:  www.squid-cache.org/ (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Mar 31 2010 (Red Hat Issues Fix) Squid Infinite Loop in strListGetItem() Lets Remote Users Deny Service
Red Hat has issued a fix for Red Hat Enterprise Linux 5.



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