Squid Input Validation Error in Processing WCCP Messages Lets Remote Users Crash Squid
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SecurityTracker Alert ID: 1012882
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SecurityTracker URL: http://securitytracker.com/id?1012882
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CVE Reference: CAN-2005-0095
(Links to External Site)
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OSVDB Reference: 12886
(Links to External Site)
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Nessus Reference: 16190
(Links to External Site)
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Updated: Jan 19 2005
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Original Entry Date: Jan 13 2005
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Impact: Denial of service via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 2.5
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Description: A denial of service vulnerability was reported in Squid in the processing of WCCP messages. A remote user can cause Squid to crash.
The vendor reported that a remote user can send specially crafted WCCP_I_SEE_YOU packet with the 'number of caches' field set to
a value outside of the 1 - 32 range and with a spoofed address. If WCCP is enabled on the target system (which is not the default
setting), Squid may crash.
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Impact: A remote user can cause Squid to crash.
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Solution: A patch (squid-2.5.STABLE7-wccp_denial_of_service.patch) is available at:
http://www.squid-cache.org/Versions/v2/2.5/bugs/squid-2.5.STABLE7-wccp_denial_of_service.patch
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Vendor URL: www.squid-cache.org/ (Links to External Site)
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Cause: Boundary error
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Underlying OS: Linux (Any), UNIX (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Wed, 12 Jan 2005 23:29:04 -0500
Subject: [none]
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> Denial of service with forged WCCP messages
> WCCP_I_SEE_YOU messages contain a 'number of caches' field which should be between
> 1 and 32. Values outside that range may crash Squid if WCCP is enabled, and if an
> attacker can spoof UDP packets with the WCCP router's IP address.
> versions Squid-2.5 and earlier
A patch (squid-2.5.STABLE7-wccp_denial_of_service.patch) is available at:
http://www.squid-cache.org/Versions/v2/2.5/bugs/squid-2.5.STABLE7-wccp_denial_of_service.patch
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