Squid "asn_parse_header()" Function Denial of Service Vulnerability - Secunia Advisories - Vulnerability Intelligence

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Squid "asn_parse_header()" Function Denial of Service Vulnerability
Secunia Advisory:	SA12791	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2004-10-12
Last Update:	2008-06-27
Popularity:	8,444 views

Critical:	Less critical
Impact:	DoS
Where:	From local network
Solution Status:	Vendor Patch

Software:	Squid 2.x Squid 3.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2004-0918

Description: A vulnerability has been reported in Squid, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to an input validation error in the SNMP module within the "asn_parse_header()" function when handling certain negative length fields. This can be exploited to restart Squid by sending a UDP datagram containing specially crafted header length combinations. Successful exploitation requires that SNMP support is enabled. The vulnerability affects 2.x versions prior to 2.5.STABLE7 and 3.x versions prior to 3.0.STABLE7. Solution: Update to a fixed version or apply patches. -- Squid 2.x -- Apply patch or update to version 2.5.STABLE7. http://www.squid-cache.org/Versions/v2/2.5/ Patch for version 2.5.STABLE6: http://www.squid-cache.org/Versions/v...quid-2.5.STABLE6-SNMP_core_dump.patch -- Squid 3.x -- Apply patch or update to version 3.0.STABLE7. http://www.squid-cache.org/Versions/v3/3.0/ Patch for version 3.0.STABLE6: http://www.squid-cache.org/Versions/v3/3.0/changesets/b8826.patch Provided and/or discovered by: Discovered by anonymous person and reported via iDEFENSE. Changelog: 2004-10-25: Added link to vendor advisory. 2008-06-27: Added "Squid 3.x" to the list of affected products. Updated the "Solution" section with patch information for the 3.x branch. Added vendor link to the "Original Advisory" section. Original Advisory: Squid: http://www.squid-cache.org/Advisories/SQUID-2004_3.txt http://www.squid-cache.org/Advisories/SQUID-2008_1.txt iDEFENSE: http://www.idefense.com/application/poi/display?id=152&type=vulnerabilities

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