Vulnerability · Published Jan 23, 2024 · Assigned by GitHub_M
CVE-2024-23638SQUID-2023:11 Denial of Service in Cache Manager
Medium 6.5
In plain English
A medium-severity security flaw in squid from squid-cache. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 60.1% (higher than 99.1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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`.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | libecap | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2024:9644 |
| AlmaLinux:8 | libecap | 1.0.1-2.module_el8.6.0+3048+383bc947 | ALSA-2024:9644 |
| AlmaLinux:8 | libecap-devel | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2024:9644 |
| AlmaLinux:8 | libecap-devel | 1.0.1-2.module_el8.6.0+3048+383bc947 | ALSA-2024:9644 |
| AlmaLinux:8 | squid | 7:4.15-10.module_el8.10.0+3916+ed00a4a0.3 | ALSA-2024:9644 |
| AlmaLinux:9 | squid | 7:5.5-13.el9_4 | ALSA-2024:4861 |
| Debian:12 | squid | 5.7-2+deb12u1 | DEBIAN-CVE-2024-23638 |
| Debian:12 | squid | 5.7-2+deb12u1 | DSA-5637-1 |
| Debian:13 | squid | 6.6-1 | DEBIAN-CVE-2024-23638 |
| Debian:14 | squid | 6.6-1 | DEBIAN-CVE-2024-23638 |
| Rocky Linux:8 | libecap | 0:1.0.1-2.module+el8.9.0+1437+df5ea8f0 | RLSA-2024:9644 |
| Rocky Linux:8 | squid | 7:4.15-10.module+el8.10.0+1758+80ba9f4b | RLSA-2024:9644 |
| Rocky Linux:9 | squid | 7:5.5-13.el9_4 | RLSA-2024:4861 |
| Ubuntu:22.04:LTS | squid | 5.7-0ubuntu0.22.04.4 | USN-6728-1 |
| Ubuntu:22.04:LTS | squid | 5.7-0ubuntu0.22.04.4 | UBUNTU-CVE-2024-23638 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| squid-cache | squid | < 6.6 |
Weakness: CWE-825 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/squid-cache/squid/security/advisories/GHSA-j49p-553x-48rx x_refsource_CONFIRM
- https://github.com/squid-cache/squid/commit/290ae202883ac28a48867079c2fb34c40efd382b x_refsource_MISC
- https://github.com/squid-cache/squid/commit/e8118a7381213f5cfcdeb4cec1d2d854bfd261c8 x_refsource_MISC
- https://megamansec.github.io/Squid-Security-Audit/stream-assert.html x_refsource_MISC
- http://www.squid-cache.org/Versions/v5/SQUID-2023_11.patch x_refsource_MISC
- http://www.squid-cache.org/Versions/v6/SQUID-2023_11.patch x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20240208-0010/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7R4KPSO3MQT3KAOZV7LC2GG3CYMCGK7H/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWQHRDRHDM5PQTU6BHH4C5KGL37X6TVI/