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Fencer Vulns
medium 6.3

CVE-2024-37894 json

Squid vulnerable to heap corruption in ESI assign

published 2024-06-25 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-36874

cvss
6.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.3%
EPSS 6.3% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Out-of-bounds Write error when assigning ESI variables, Squid is susceptible to a Memory Corruption error. This error can lead to a Denial of Service attack.

Patch / fix

  • squid-cache squid 6.10
  • squid Debian 12 5.7-2+deb12u2
  • squid Debian 14, Debian 13 6.10-1

debian advisories DEBIAN-CVE-2024-37894

  • squid Ubuntu 20.04 LTS 4.10-1ubuntu1.13
  • squid Ubuntu 22.04 LTS 5.9-0ubuntu0.22.04.2
  • squid Ubuntu 24.04 LTS 6.6-1ubuntu5.1
  • squid3 Ubuntu Pro 16.04 LTS 3.5.12-1ubuntu7.16+esm4
  • squid3 Ubuntu Pro 18.04 LTS 3.5.27-1ubuntu1.14+esm3

ubuntu advisories UBUNTU-CVE-2024-37894

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • squid RHEL 9 7:5.5-13.el9_4
  • squid RHEL 9.2 EUS 7:5.5-5.el9_2.7

red hat advisories RHSA-2024:5906RHSA-2024:4861

  • squid SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 4.17-150000.5.55.1
  • squid SLES for SAP 12 SP5, SLES 12 SP5 4.17-4.50.1
  • squid SLE Module for Server Applications 15 SP5, openSUSE Leap 15.5 5.7-150400.3.32.1
  • squid SLE Module for Server Applications 15 SP6, openSUSE Leap 15.6 6.10-150600.3.6.1

suse advisories SUSE-SU-2025:03521-1SUSE-SU-2024:2270-1SUSE-SU-2024:2269-1SUSE-SU-2024:2268-1

  • squid openSUSE Tumbleweed 6.10-1.1

opensuse advisories openSUSE-SU-2024:14080-1

  • squid AlmaLinux 9 7:5.5-13.el9_4

almalinux advisories ALSA-2024:4861

  • squid Rocky Linux 9 7:5.5-13.el9_4

rocky linux advisories RLSA-2024:4861

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-37894 updated cvss 6.3

squid: Out-of-bounds write error may lead to Denial of Service

  • Red Hat Enterprise Linux 6 squid, squid34 Red Hat Enterprise Linux 7 squid, squid-sysvinit, squid-migration-script
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 squid, libecap
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 9) squid 5.5-13.el9_4
    fixed: vendor fix RHSA-2024:4861
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) squid 5.5-5.el9_2.7
    fixed: vendor fix RHSA-2024:5906
  • Red Hat Enterprise Linux 10 squid
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

6.25% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Affected products

  • squid-cache squid

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.