CVE-2024-23638
Published: 24 January 2024
Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
squid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Released
(4.10-1ubuntu1.10)
|
|
| jammy |
Released
(5.7-0ubuntu0.22.04.4)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Released
(6.1-2ubuntu1.3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(6.6-1)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/squid-cache/squid/commit/290ae202883ac28a48867079c2fb34c40efd382b upstream: https://github.com/squid-cache/squid/commit/61c9e763b4baa69facbd502aacb991f2bfa31293 upstream: http://www.squid-cache.org/Versions/v5/SQUID-2023_11.patch upstream: http://www.squid-cache.org/Versions/v6/SQUID-2023_11.patch |
||
|
squid3 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Does not exist
|
|
| jammy |
Does not exist
|
|
| lunar |
Does not exist
|
|
| mantic |
Does not exist
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |