CVE catalog
CVE-2023-50269
squid: CVE-2023-50269
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 57.63% · Oct 25, 2026
Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. 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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | squid | sid | 7.7-1 | fixed |
| Debian | squid | forky | 7.7-1 | fixed |
| Debian | squid | trixie | 6.13-2+deb13u3 | fixed |
| Debian | squid | trixie-security | 6.13-2+deb13u2 | fixed |
| Debian | squid | bookworm | 5.7-2+deb12u5 | fixed |
| Debian | squid | bookworm-security | 5.7-2+deb12u6 | fixed |
| Alpine | squid | 3.19 | 6.6-r0 | fixed |
| Alpine | squid | 3.20 | 6.6-r0 | fixed |
| Alpine | squid | 3.21 | 6.6-r0 | fixed |
| Alpine | squid | 3.22 | 6.6-r0 | fixed |
| Alpine | squid | 3.23 | 6.6-r0 | fixed |
| Alpine | squid | 3.24 | 6.6-r0 | fixed |
| Suse | squid | linux enterprise server 12 sp5 | 4.17-4.41.1 | fixed |
| Suse | squid | linux enterprise server for sap applications 12 sp5 | 4.17-4.41.1 | fixed |
| Ubuntu | squid3 | pro | 3.5.23-5ubuntu1 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.23-5ubuntu2 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.1 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.2 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.3 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.4 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.5 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.6 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.7 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.8 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.9 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.10 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.11 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.12 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.13 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14+esm1 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14+esm2 | fixed |
| Ubuntu | squid | 20.04 | 4.8-1ubuntu2 | vulnerable |
| Ubuntu | squid | 20.04 | 4.8-1ubuntu3 | vulnerable |
| Ubuntu | squid | 20.04 | 4.9-2ubuntu1 | vulnerable |
| Ubuntu | squid | 20.04 | 4.9-2ubuntu2 | vulnerable |
| Ubuntu | squid | 20.04 | 4.9-2ubuntu3 | vulnerable |
| Ubuntu | squid | 20.04 | 4.9-2ubuntu4 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.1 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.2 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.3 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.4 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.5 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.6 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.7 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.8 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.9 | fixed |
| Ubuntu | squid | 22.04 | 4.13-10ubuntu5 | vulnerable |
| Ubuntu | squid | 22.04 | 5.2-1ubuntu1 | vulnerable |
| Ubuntu | squid | 22.04 | 5.2-1ubuntu3 | vulnerable |
| Ubuntu | squid | 22.04 | 5.2-1ubuntu4 | vulnerable |
| Ubuntu | squid | 22.04 | 5.2-1ubuntu4.1 | vulnerable |
| Ubuntu | squid | 22.04 | 5.2-1ubuntu4.2 | vulnerable |
| Ubuntu | squid | 22.04 | 5.2-1ubuntu4.3 | vulnerable |
| Ubuntu | squid | 22.04 | 5.7-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | squid | 22.04 | 5.7-0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | squid | 22.04 | 5.7-0ubuntu0.22.04.3 | fixed |
| Ubuntu | squid | 24.04 | 6.1-2ubuntu1 | vulnerable |
| Ubuntu | squid | 24.04 | 6.1-2ubuntu2 | vulnerable |
| Ubuntu | squid | 24.04 | 6.5-1ubuntu1 | vulnerable |
| Ubuntu | squid | 24.04 | 6.5-1ubuntu2 | vulnerable |
| Ubuntu | squid | 24.04 | 6.5-1ubuntu3 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp2-ltss | 4.17-150000.5.49.1 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp3-ltss | 4.17-150000.5.49.1 | fixed |
| Suse | squid | linux enterprise server 15 sp2-ltss | 4.17-150000.5.49.1 | fixed |
| Suse | squid | linux enterprise server 15 sp3-ltss | 4.17-150000.5.49.1 | fixed |
| Suse | squid | linux enterprise server for sap applications 15 sp2 | 4.17-150000.5.49.1 | fixed |
| Suse | squid | linux enterprise server for sap applications 15 sp3 | 4.17-150000.5.49.1 | fixed |
| Suse | squid | enterprise storage 7.1 | 4.17-150000.5.49.1 | fixed |
| Suse | squid | linux enterprise module for server applications 15 sp5 | 5.7-150400.3.23.1 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp4-espos | 5.7-150400.3.23.1 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp4-ltss | 5.7-150400.3.23.1 | fixed |
| Suse | squid | linux enterprise server 15 sp4-ltss | 5.7-150400.3.23.1 | fixed |
| Suse | squid | linux enterprise server for sap applications 15 sp4 | 5.7-150400.3.23.1 | fixed |
| Suse | squid | manager proxy 4.3 | 5.7-150400.3.23.1 | fixed |
| Suse | squid | manager server 4.3 | 5.7-150400.3.23.1 | fixed |
| Opensuse | squid | leap 15.5 | 5.7-150400.3.23.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | squid | source | sid | 6.6-1 | not yet assigned | Not reported | [1058721] |
| Debian | squid | source | forky | 6.6-1 | not yet assigned | Not reported | [1058721] |
| Debian | squid | source | trixie | 6.6-1 | not yet assigned | Not reported | [1058721] |
| Debian | squid | source | bookworm | 5.7-2+deb12u1 | not yet assigned | Not reported | [1058721] |
| Alpine | squid | apk | 3.19 | 6.6-r0 | Not reported | ALPINE-CVE-2023-50269 | Not reported |
| Alpine | squid | apk | 3.20 | 6.6-r0 | Not reported | ALPINE-CVE-2023-50269 | Not reported |
| Alpine | squid | apk | 3.21 | 6.6-r0 | Not reported | ALPINE-CVE-2023-50269 | Not reported |
| Alpine | squid | apk | 3.22 | 6.6-r0 | Not reported | ALPINE-CVE-2023-50269 | Not reported |
| Alpine | squid | apk | 3.23 | 6.6-r0 | Not reported | ALPINE-CVE-2023-50269 | Not reported |
| Alpine | squid | apk | 3.24 | 6.6-r0 | Not reported | ALPINE-CVE-2023-50269 | Not reported |
| Suse | squid | rpm | linux enterprise server 12 sp5 | 4.17-4.41.1 | Not reported | SUSE-SU-2024:0296-1 | Not reported |
| Suse | squid | rpm | linux enterprise server for sap applications 12 sp5 | 4.17-4.41.1 | Not reported | SUSE-SU-2024:0296-1 | Not reported |
| Ubuntu | squid3 | deb | pro | 3.5.27-1ubuntu1.14+esm2 | Not reported | UBUNTU-CVE-2023-50269 | Not reported |
| Ubuntu | squid | deb | 20.04 | 4.10-1ubuntu1.9 | Not reported | UBUNTU-CVE-2023-50269 | Not reported |
| Ubuntu | squid | deb | 22.04 | 5.7-0ubuntu0.22.04.3 | Not reported | UBUNTU-CVE-2023-50269 | Not reported |
| Ubuntu | squid | deb | 24.04 | 6.5-1ubuntu3 | Not reported | UBUNTU-CVE-2023-50269 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp2-ltss | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp3-ltss | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | linux enterprise server 15 sp2-ltss | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | linux enterprise server 15 sp3-ltss | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | linux enterprise server for sap applications 15 sp2 | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | linux enterprise server for sap applications 15 sp3 | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | enterprise storage 7.1 | 4.17-150000.5.49.1 | Not reported | SUSE-SU-2024:0298-1 | Not reported |
| Suse | squid | rpm | linux enterprise module for server applications 15 sp5 | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp4-espos | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp4-ltss | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Suse | squid | rpm | linux enterprise server 15 sp4-ltss | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Suse | squid | rpm | linux enterprise server for sap applications 15 sp4 | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Suse | squid | rpm | manager proxy 4.3 | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Suse | squid | rpm | manager server 4.3 | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
| Opensuse | squid | rpm | leap 15.5 | 5.7-150400.3.23.1 | Not reported | SUSE-SU-2024:0455-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://access.redhat.com/errata/RHSA-2024:1085]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2024_1375.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2023-50269]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-50269]
- [https://osv.dev/vulnerability/SUSE-SU-2024:0296-1]
- [https://osv.dev/vulnerability/SUSE-SU-2024:0298-1]
- [https://osv.dev/vulnerability/SUSE-SU-2024:0455-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-50269]
- [https://security-tracker.debian.org/tracker/CVE-2023-50269]
- [https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-3150.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]