CVE-2009-2855

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Summary

CVECVE-2009-2855
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2009-08-18 21:00:00 UTC
Updated2026-04-23 00:35:47 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 5 from [email protected]

AV:N/AC:L/Au:N/C:N/I:N/A:P

Problem Types: CWE-20 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Squid-cache Squid 2.7 All All All
Application Squid-cache Squid 2.7 stable3 All All
Application Squid-cache Squid 2.7 stable4 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
404 Not Found af854a3a-2127-422b-91ae-364da2661108 www.squid-cache.org
IBM X-Force Exchange af854a3a-2127-422b-91ae-364da2661108 exchange.xforce.ibmcloud.com
Bug 518182 – CVE-2009-2855 squid: DoS (100% CPU use) while processing certain external ACL helper HTTP headers af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
SecurityTracker.com Archives - Squid Infinite Loop in strListGetItem() Lets Remote Users Deny Service af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
Error af854a3a-2127-422b-91ae-364da2661108 bugs.debian.org
oss-security - squid DoS in external auth header parser af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Repository / Oval Repository af854a3a-2127-422b-91ae-364da2661108 oval.cisecurity.org
404 Not Found af854a3a-2127-422b-91ae-364da2661108 www.squid-cache.org Vendor Advisory
Squid Web Proxy Cache Authentication Header Parsing Remote Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
#534982 - squid - DoS in external auth header parser - Debian Bug report logs af854a3a-2127-422b-91ae-364da2661108 bugs.debian.org
oss-security - Re: squid DoS in external auth header parser af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
oss-security - Re: squid DoS in external auth header parser af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
MISC:http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=31;filename=diff;att=1;bug=534982 MITRE bugs.debian.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

OrganizationPublishedContributorStatement
Red Hat2010-03-31Tomas HogerThis issue did not affect the versions of the squid packages, as shipped with Red Hat Enterprise Linux 3 and 4. The issue was addressed in the squid packages as shipped with Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2010-0221.html

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