{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Low" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2009/cve-2009-2855.json" } ], "title": "squid: DoS (100% CPU use) while processing certain external ACL helper HTTP headers", "tracking": { "current_release_date": "2025-11-21T13:10:52+00:00", "generator": { "date": "2025-11-21T13:10:52+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.6.12" } }, "id": "CVE-2009-2855", "initial_release_date": 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"2009-08-18T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "518182" } ], "notes": [ { "category": "description", "text": "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.", "title": "Vulnerability description" }, { "category": "summary", "text": "squid: DoS (100% CPU use) while processing certain external ACL helper HTTP headers", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue did not affect the versions of the squid packages, as shipped with Red Hat Enterprise Linux 3 and 4.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.src", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.x86_64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-7:2.6.STABLE21-6.el5.i386", "5Server:squid-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-7:2.6.STABLE21-6.el5.src", "5Server:squid-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2009-2855" }, { "category": "external", "summary": "RHBZ#518182", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=518182" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2009-2855", "url": "https://www.cve.org/CVERecord?id=CVE-2009-2855" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2009-2855", "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-2855" } ], "release_date": "2009-06-28T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2010-03-29T12:00:00+00:00", "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259", "product_ids": [ "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.src", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.x86_64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-7:2.6.STABLE21-6.el5.i386", "5Server:squid-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-7:2.6.STABLE21-6.el5.src", "5Server:squid-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64" ], "url": "https://access.redhat.com/errata/RHSA-2010:0221" } ], "scores": [ { "cvss_v2": { "accessComplexity": "MEDIUM", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.9, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:A/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0" }, "products": [ "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.src", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.x86_64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-7:2.6.STABLE21-6.el5.i386", "5Server:squid-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-7:2.6.STABLE21-6.el5.src", "5Server:squid-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Low", "product_ids": [ "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.src", "5Client-Workstation:squid-7:2.6.STABLE21-6.el5.x86_64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Client-Workstation:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-7:2.6.STABLE21-6.el5.i386", "5Server:squid-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-7:2.6.STABLE21-6.el5.src", "5Server:squid-7:2.6.STABLE21-6.el5.x86_64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.i386", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ia64", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.ppc", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.s390x", "5Server:squid-debuginfo-7:2.6.STABLE21-6.el5.x86_64" ] } ], "title": "squid: DoS (100% CPU use) while processing certain external ACL helper HTTP headers" } ] }