CVE-2023-46728: SQUID-2021:8 Denial of Service in Gopher gateway

Published Nov 6, 2023
·
Updated

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.

Affected Software

9 affected componentsFixes available
ubuntu/squid<4.10-1ubuntu1.8
4.10-1ubuntu1.8
ubuntu/squid<5.7-0ubuntu0.22.04.2
5.7-0ubuntu0.22.04.2
ubuntu/squid<5.7-1ubuntu3.1
5.7-1ubuntu3.1
ubuntu/squid<6.1-1
6.1-1
ubuntu/squid3<3.5.27-1ubuntu1.14+
3.5.27-1ubuntu1.14+
ubuntu/squid3<3.5.12-1ubuntu7.16+
3.5.12-1ubuntu7.16+
redhat/squid<6.0.1
6.0.1
debian/squid<=4.6-1+deb10u7, <=4.6-1+deb10u10, <=4.13-10+deb11u2, <=4.13-10+deb11u3, <=5.7-2, <=5.7-2+deb12u1
6.9-1
Squid-Cache Squid<6.0.1

Event History

Nov 6, 2023
CVE Published
via Ubuntu·12:00 AM
CVE Published
via MITRE·05:13 PM
Data Sourced
via MITRE·05:13 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jan 12, 2024
Data Sourced
via Launchpad·01:29 PM
Description

Parent advisories

This vulnerability appears in the following advisories.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203