CVE-2018-1000024

mediumpriority · track · 33EPSS 0.079 · 95 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
7.93% (95th) EPSS
CVSS 5 · medium
Is it mine?
36 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22 contains a Incorrect Pointer Handling vulnerability in ESI Response Processing that can result in Denial of Service for all clients using the proxy.. This attack appear to be exploitable via Remote server delivers an HTTP response payload containing valid but unusual ESI syntax.. This vulnerability appears to have been fixed in 4.0.23 and later.

01

remediations

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

A vendor fix is available.

  • Fixedsquid-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-7:3.5.20-15.el7.src as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-7:3.5.20-15.el7.src as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-migration-script-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-migration-script-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-migration-script-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-migration-script-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-migration-script-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-sysvinit-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-sysvinit-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-sysvinit-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-sysvinit-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Fixedsquid-sysvinit-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the squid service will be restarted automatically.

    https://access.redhat.com/errata/RHSA-2020:1068
  • Workaroundsquid-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-7:3.5.20-15.el7.src as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-7:3.5.20-15.el7.src as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-debuginfo-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-migration-script-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-migration-script-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-migration-script-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-migration-script-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-migration-script-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-sysvinit-7:3.5.20-15.el7.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-sysvinit-7:3.5.20-15.el7.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-sysvinit-7:3.5.20-15.el7.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-sysvinit-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

  • Workaroundsquid-sysvinit-7:3.5.20-15.el7.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    A workaround for this issue is to not use the internal ESI parser, which can be achieved by adding either the "esi_parser expat" or "esi_parser libxml2" configuration directive to the squid configuration file (for example /etc/squid/squid.conf).

02

cvss

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

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.07.4highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · Red Hat Product Security US
03

weaknesses

The CWE weakness classes this flaw belongs to.

04

affected products (36)

Products and version ranges known to be affected.

showing 20 of 36
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • RHSA-2020:1068Red Hat Security Advisory: squid security and bug fix update2020-03-31csaf · redhat_csafUS

    An update for squid is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. [Updated 22 October 2020] This update was found to introduce a bug in cachemgr.cgi that could prevent access to the cache manager. This is not a security regression. The fix is being tracked in https://bugzilla.redhat.com/show_bug.cgi?id=1890581

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

published 2018-02-09modified 2026-06-17
08

references (21)

External citations — patches, advisories, analysis.

scry

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