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TI-2018-15684 Aliases CVE-2018-1000024GHSA-gh8j-c69q-gf38

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

Priority MEDIUM 44Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.07928 94th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 4 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*3.0 – 3.5.27; 4.0 – 4.0.22Vulnerablesquid-cache
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
  • cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* Versions 3.0 – 3.5.27; 4.0 – 4.0.22 Vulnerable ·squid-cache
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical

Remediation

Red Hat 1 advisory

  • RHSA-2020:1068 Released 2020-03-31 · Red Hat rating Moderate
    squid security and bug fix update
    • Red Hat Enterprise Linux Server (v. 7) squid-7:3.5.20-15.el7, squid-migration-script-7:3.5.20-15.el7
    • Red Hat Enterprise Linux Server Optional (v. 7) squid-sysvinit-7:3.5.20-15.el7
    • Red Hat Enterprise Linux Workstation (v. 7) squid-7:3.5.20-15.el7, squid-migration-script-7:3.5.20-15.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) squid-sysvinit-7:3.5.20-15.el7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:1068
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:1068
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:1068
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:1068
Not affected: 2 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-1000024
  2. 2026-10-03 Alias added: GHSA-gh8j-c69q-gf38

References

Patch 1

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences