CVE & CISA-KEV CatalogNVD
CVE-2009-2855
MEDIUMEPSS 98th pctl5.0
CVSS v2
Description
The strListGetItem function in src/HttpHeaderTools.c in Squid 2.7 allows remote attackers to cause a denial of service via a crafted auth header with certain comma delimiters that trigger an infinite loop of calls to the strcspn function.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
36.73%probability of exploitation in 30 days
98thpercentile
Very high risk: more likely to be exploited than 98% of all known CVEs.
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=534982
- http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=31%3Bfilename=diff%3Batt=1%3Bbug=534982
- http://www.openwall.com/lists/oss-security/2009/07/20/10
- http://www.openwall.com/lists/oss-security/2009/08/03/3
- http://www.openwall.com/lists/oss-security/2009/08/04/6
- http://www.securityfocus.com/bid/36091
- http://www.securitytracker.com/id?1022757
- http://www.squid-cache.org/bugs/show_bug.cgi?id=2541
- http://www.squid-cache.org/bugs/show_bug.cgi?id=2704
- https://bugzilla.redhat.com/show_bug.cgi?id=518182
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52610
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10592
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.