Every CVE Search/ Get API key

CVE-2018-1000024

The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

7.93%Up 6.1 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2018-1000024
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2018-1000024
Updated
2026-11-02
EUVDEUVD-2018-1786 No score

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.

Record
EUVD-2018-1786
Updated
2026-11-03
GitHub AdvisoriesGHSA-gh8j-c69q-gf38 7.5

The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22...

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.

Record
GHSA-gh8j-c69q-gf38
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVALPINE-CVE-2018-1000024 7.5

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.

Record
ALPINE-CVE-2018-1000024
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 7.5

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.

Record
CVE-2018-1000024
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVDEBIAN-CVE-2018-1000024 7.5

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.

Record
DEBIAN-CVE-2018-1000024
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2020:1068 7.4

Red Hat Security Advisory: squid security and bug fix update

Record
RHSA-2020:1068
CVSS 3.0
7.4 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-1000024 7.5

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.

Record
UBUNTU-CVE-2018-1000024
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11403-1 No score

squid-4.16-1.5 on GA media

These are all security issues fixed in the squid-4.16-1.5 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11403-1
Updated
2026-11-02
OSVSUSE-SU-2018:0636-1 No score

Security update for squid

This update for squid fixes the following issues:

Security issues fixed:

  • CVE-2018-1000024: DoS fix caused by incorrect pointer handling when processing ESI responses. This affects the default custom esi_parser (bsc#1077003).
  • CVE-2018-1000027: DoS fix caused by incorrect pointer handing whien processing ESI responses or downloading intermediate CA certificates (bsc#1077006).
Record
SUSE-SU-2018:0636-1
Updated
2026-11-02
OSVSUSE-SU-2018:0752-1 No score

Security update for squid3

This update for squid3 fixes the following issues:

Security issues fixed:

  • CVE-2018-1000024: DoS fix caused by incorrect pointer handling when processing ESI responses. This affects the default custom esi_parser (bsc#1077003).
  • CVE-2018-1000027: DoS fix caused by incorrect pointer handing whien processing ESI responses or downloading intermediate CA certificates (bsc#1077006).
Record
SUSE-SU-2018:0752-1
Updated
2026-11-02
OSVUSN-3557-1 No score

squid3 vulnerabilities

Mathias Fischer discovered that Squid incorrectly handled certain long strings in headers. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-2569)

William Lima discovered that Squid incorrectly handled XML parsing when processing Edge Side Includes (ESI). A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-2570)

Alex Rousskov discovered that Squid incorrectly handled response-parsing failures. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-2571)

Santiago Ruano Rincón discovered that Squid incorrectly handled certain Vary headers. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-3948)

Louis Dion-Marcil discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. (CVE-2018-1000024)

Louis Dion-Marcil discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. (CVE-2018-1000027)

Record
USN-3557-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
squid
Alpine:v3.10
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.11
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.12
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.13
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.14
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.15
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.16
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.17
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.18
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.19
 3.0 up to 3.5.27-r2
3.5.27-r2
Show 36 moreShow less
Affected packages
PackageAffectedFixed
squid
Alpine:v3.20
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.21
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.22
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.23
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.24
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.4
 3.0 up to 3.5.27-r0
3.5.27-r0
squid
Alpine:v3.5
 3.0 up to 3.5.27-r0
3.5.27-r0
squid
Alpine:v3.6
 3.0 up to 3.5.27-r0
3.5.27-r0
squid
Alpine:v3.7
 3.0 up to 3.5.27-r0
3.5.27-r0
squid
Alpine:v3.8
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Alpine:v3.9
 3.0 up to 3.5.27-r2
3.5.27-r2
squid
Debian:12
 before 4.1-1
4.1-1
squid
Debian:13
 before 4.1-1
4.1-1
squid
Debian:14
 before 4.1-1
4.1-1
squid3
Debian:7
 before 3.1.20-2.2+deb7u8, plus listed versions
3.1.20-2.23.1.20-2.2+deb7u13.1.20-2.2+deb7u23.1.20-2.2+deb7u33.1.20-2.2+deb7u43.1.20-2.2+deb7u53.1.20-2.2+deb7u63.1.20-2.2+deb7u7
3.1.20-2.2+deb7u8
squid3
Debian:8
 before 3.4.8-6+deb8u5, plus listed versions
3.4.8-63.4.8-6+deb8u13.4.8-6+deb8u23.4.8-6+deb8u2~bpo70+13.4.8-6+deb8u33.4.8-6+deb8u4
3.4.8-6+deb8u5
squid3
Debian:9
 before 3.5.23-5+deb9u1, plus listed versions
3.5.23-5
3.5.23-5+deb9u1
squid
Red Hat:enterprise_linux:7::server
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid-debuginfo
Red Hat:enterprise_linux:7::server
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid-migration-script
Red Hat:enterprise_linux:7::server
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid-sysvinit
Red Hat:enterprise_linux:7::server
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid
Red Hat:enterprise_linux:7::workstation
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid-debuginfo
Red Hat:enterprise_linux:7::workstation
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid-migration-script
Red Hat:enterprise_linux:7::workstation
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid-sysvinit
Red Hat:enterprise_linux:7::workstation
 before 7:3.5.20-15.el7
7:3.5.20-15.el7
squid
SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2
 before 3.5.21-26.6.1
3.5.21-26.6.1
squid
SUSE:Linux Enterprise Server 12 SP2
 before 3.5.21-26.6.1
3.5.21-26.6.1
squid
SUSE:Linux Enterprise Server for SAP Applications 12 SP2
 before 3.5.21-26.6.1
3.5.21-26.6.1
squid
SUSE:Linux Enterprise Server 12 SP3
 before 3.5.21-26.6.1
3.5.21-26.6.1
squid
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
 before 3.5.21-26.6.1
3.5.21-26.6.1
squid3
SUSE:Linux Enterprise Server 11 SP4
 before 3.1.23-8.16.37.3.1
3.1.23-8.16.37.3.1
squid3
SUSE:Linux Enterprise Server for SAP Applications 11 SP4
 before 3.1.23-8.16.37.3.1
3.1.23-8.16.37.3.1
squid3
Ubuntu:14.04:LTS
 before 3.3.8-1ubuntu6.11, plus listed versions
3.3.8-1ubuntu33.3.8-1ubuntu43.3.8-1ubuntu53.3.8-1ubuntu63.3.8-1ubuntu6.1
Show 7 moreShow less
3.3.8-1ubuntu6.23.3.8-1ubuntu6.33.3.8-1ubuntu6.43.3.8-1ubuntu6.63.3.8-1ubuntu6.83.3.8-1ubuntu6.93.3.8-1ubuntu6.10
3.3.8-1ubuntu6.11
squid3
Ubuntu:16.04:LTS
 before 3.5.12-1ubuntu7.5, plus listed versions
3.3.8-1ubuntu163.3.8-1ubuntu173.5.12-1ubuntu63.5.12-1ubuntu73.5.12-1ubuntu7.13.5.12-1ubuntu7.23.5.12-1ubuntu7.33.5.12-1ubuntu7.4
3.5.12-1ubuntu7.5
squid3
Ubuntu:18.04:LTS
 before 3.5.23-5ubuntu2, plus listed versions
3.5.23-5ubuntu1
3.5.23-5ubuntu2
squid
openSUSE:Tumbleweed
 before 4.16-1.5
4.16-1.5

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-1000024 is a high vulnerability (CVSS 7.5) in Squid-cache Squid, published January 29, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.93%, the 94th percentile. Fixed in squid 3.5.27-r2.

References

Show 73 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open