Improper Certificate Validation in Squid - CVE-2023-46724

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Main Vulnerability Database Vulnerabilities #VU82906

Improper Certificate Validation in Squid - CVE-2023-46724

Published: November 8, 2023


Vulnerability identifier: #VU82906
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-46724
CWE-ID: CWE-295
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 input validation when processing a specially crafted SSL Certificate in a server certificate chain. A remote attacker can initiate a TLS Handshake with a specially crafted SSL certificate and perform a denial of service (DoS) attack.


Affected software

Squid
Amazon Linux AMI
Oracle Linux
Debian Linux
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE CaaS Platform
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server
Anolis OS
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
SUSE Enterprise Storage
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS
SUSE Linux Enterprise Server 15 SP1 LTSS
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
Server Applications Module
openSUSE Leap
openEuler
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
libecap-devel
libecap
squid-sysvinit
squid-migration-script
squid
squid (Red Hat package)
squid-debugsource
squid-debuginfo
squid (Ubuntu package)
squid (Debian package)
squid-doc
QNAP Proxy Server
Session Smart Router

How to mitigate CVE-2023-46724

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-sysvinit - update to 3.5.20-17
squid-migration-script - update to 3.5.20-17
squid - addressed in versions 3.5.20-17, 4.15-11, 6.5-1
squid (Red Hat package) - addressed in versions 3.5.20-17.el7_9.10, 5.2-1.el9_0.4, 5.5-6.el9_3.5
squid - addressed in versions 3.5.20-17.52, 5.8-1
squid-debugsource - update to 4.9-16
squid-debuginfo - update to 4.9-16
squid - update to 4.9-16
squid (Ubuntu package) - addressed in versions 4.10-1ubuntu1.8, 5.7-0ubuntu0.22.04.2, 5.7-1ubuntu3.1, 6.1-2ubuntu1.1
squid (Debian package) - addressed in versions 4.13-10+deb11u3, 5.7-2+deb12u1
squid-debuginfo - addressed in versions 4.17-4.30.1, 4.17-150000.5.38.1, 5.7-150400.3.12.1
squid-debugsource - addressed in versions 4.17-4.30.1, 4.17-150000.5.38.1, 5.7-150400.3.12.1
squid - addressed in versions 4.17-4.30.1, 4.17-150000.5.38.1, 5.7-150400.3.12.1
Session Smart Router - addressed in versions 6.2.10, 6.3.7
squid-doc - update to 6.5-1
squid - addressed in versions 6.6-1.fc38, 6.6-1.fc39

External References

Related Security Bulletins