CVE-2009-2855

mediumpriority · track · 32EPSS 0.340 · 98 %ileEUUS
grimoire priorityP1 · Urgent
Exploitable?
—
no known exploitation
Likely / severe?
34.0% (98th) EPSS
CVSS 5 · medium
Is it mine?
18 products
Check your exposure
Who says so?
3 sources
enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-28

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedsquid-7:2.6.STABLE21-6.el5.i386 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.i386 as a component of Red Hat Enterprise Linux Desktop Workstation (v. 5 client)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.ia64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.ppc as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.s390x as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.src as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.src as a component of Red Hat Enterprise Linux Desktop Workstation (v. 5 client)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.x86_64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-7:2.6.STABLE21-6.el5.x86_64 as a component of Red Hat Enterprise Linux Desktop Workstation (v. 5 client)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.i386 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.i386 as a component of Red Hat Enterprise Linux Desktop Workstation (v. 5 client)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.ia64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.ppc as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.s390x as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.x86_64 as a component of Red Hat Enterprise Linux (v. 5 server)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
  • Fixedsquid-debuginfo-7:2.6.STABLE21-6.el5.x86_64 as a component of Red Hat Enterprise Linux Desktop Workstation (v. 5 client)redhat_csaf

    Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259

    https://access.redhat.com/errata/RHSA-2010:0221
02

cvss

Technical severity, 0–10. One row per scoring source.

5.0
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.9–5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9
v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)
v2.02.9lowAV:A/AC:M/Au:N/C:N/I:N/A:Psecondary · Red Hat Product Security US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary
04

affected products (18)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • RHSA-2010:0221Red Hat Security Advisory: squid security and bug fix update2010-03-29csaf · redhat_csafUS

    An updated squid package that fixes two security issues and several bugs is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

06

also known as (2)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

enisa_euvdnvdredhat_csafNVDCVE.orgMITRE
published 2009-08-18modified 2026-06-16
09

references (24)

External citations — patches, advisories, analysis.

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