Improper Handling of Structural Elements in Squid - CVE-2023-5824

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Main Vulnerability Database Vulnerabilities #VU82316

Improper Handling of Structural Elements in Squid - CVE-2023-5824

Published: October 24, 2023 / Updated: November 8, 2023


Vulnerability identifier: #VU82316
CSH Severity: Medium
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H]
CVE-ID: CVE-2023-5824
CWE-ID: CWE-237
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of structural elements in HTTP response caching. A remote user can cause a denial of service condition on the target system.


Affected software

Squid
Amazon Linux AMI
Debian Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Anolis OS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
openEuler
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
libecap-devel
libecap
squid-debuginfo
squid
squid-debugsource
squid (Ubuntu package)
squid (Red Hat package)
squid (Debian package)
squid-doc
QNAP Proxy Server

How to mitigate CVE-2023-5824

Install updates from vendor's website.

Squid - update to 6.4
libecap-devel - update to 1.0.1-2.0.1
libecap - update to 1.0.1-2.0.1
QNAP Proxy Server - update to 1.4.6
squid-debuginfo - addressed in versions 4.9-25, 4.9-29
squid - addressed in versions 4.9-25, 4.9-29
squid-debugsource - addressed in versions 4.9-25, 4.9-29
squid (Ubuntu package) - addressed in versions 4.10-1ubuntu1.10, 4.10-1ubuntu1.11, 4.10-1ubuntu1.12, 5.7-0ubuntu0.22.04.4, 6.1-2ubuntu1.3
squid - addressed in versions 4.15-11, 6.5-1
squid (Red Hat package) - addressed in versions 5.2-1.el9_0.3, 5.2-1.el9_0.4, 5.5-5.el9_2.1, 5.5-6.el9_3.1, 5.5-6.el9_3.2
squid (Debian package) - update to 5.7-2+deb12u3
squid - addressed in versions 6.4-1.fc37, 6.4-1.fc38, 6.4-1.fc39
squid-doc - update to 6.5-1
squid - update to 6.6-1

External References

Related Security Bulletins