CVE-2016-4052

mediumpriority · track · 37EPSS 0.129 · 96 %ileEUUS
grimoire priorityP1 · Urgent
Exploitable?
—
no known exploitation
Likely / severe?
12.9% (96th) EPSS
CVSS 6.8 · medium
Is it mine?
195 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

Multiple stack-based buffer overflows in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote HTTP servers to cause a denial of service or execute arbitrary code via crafted Edge Side Includes (ESI) responses.

01

remediations

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

A vendor fix is available.

  • Fixedsquid-7:3.1.23-16.el6_8.4.i686 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.s390x as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.src as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.src as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-7:3.1.23-16.el6_8.4.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1138
  • Fixedsquid-debuginfo-7:3.1.23-16.el6_8.4.i686 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-debuginfo-7:3.1.23-16.el6_8.4.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1138
  • Fixedsquid-debuginfo-7:3.1.23-16.el6_8.4.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-debuginfo-7:3.1.23-16.el6_8.4.s390x as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-debuginfo-7:3.1.23-16.el6_8.4.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1138
  • Fixedsquid-debuginfo-7:3.1.23-16.el6_8.4.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1138
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-debuginfo-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-sysvinit-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-sysvinit-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-sysvinit-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-sysvinit-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid-sysvinit-7:3.3.8-26.el7_2.3.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-2016:1139
  • Fixedsquid34-7:3.4.14-9.el6_8.3.i686 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.s390x as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.src as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.src as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-7:3.4.14-9.el6_8.3.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1140
  • Fixedsquid34-debuginfo-7:3.4.14-9.el6_8.3.i686 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-debuginfo-7:3.4.14-9.el6_8.3.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1140
  • Fixedsquid34-debuginfo-7:3.4.14-9.el6_8.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-debuginfo-7:3.4.14-9.el6_8.3.s390x as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-debuginfo-7:3.4.14-9.el6_8.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)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-2016:1140
  • Fixedsquid34-debuginfo-7:3.4.14-9.el6_8.3.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)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-2016:1140
02

cvss

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

8.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.1–8.1

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4
v3.08.1highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 5.9
v2.05.1mediumAV:N/AC:H/Au:N/C:P/I:P/A:Psecondary · Red Hat Product Security US
v3.07.4highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

04

affected products (195)

Products and version ranges known to be affected.

showing 20 of 195
05

advisories (3)

Vendor and ecosystem advisories describing this.

  • RHSA-2016:1138Red Hat Security Advisory: squid security update2016-05-31csaf · redhat_csafUS

    An update for squid is now available for Red Hat Enterprise Linux 6. 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.

  • RHSA-2016:1139Red Hat Security Advisory: squid security update2016-05-31csaf · 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.

  • RHSA-2016:1140Red Hat Security Advisory: squid34 security update2016-05-31csaf · redhat_csafUS

    An update for squid34 is now available for Red Hat Enterprise Linux 6. 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.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

published 2016-04-25modified 2026-06-17
09

references (38)

External citations — patches, advisories, analysis.

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