CVE catalog
CVE-2023-49288
squid: CVE-2023-49288
- 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
- 4.78% · Oct 25, 2026
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.
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 | vulnerable |
| Debian | squid | bookworm-security | 5.7-2+deb12u6 | vulnerable |
| Alpine | squid | 3.19 | 6.1-r0 | fixed |
| Alpine | squid | 3.20 | 6.1-r0 | fixed |
| Alpine | squid | 3.21 | 6.1-r0 | fixed |
| Alpine | squid | 3.22 | 6.1-r0 | fixed |
| Alpine | squid | 3.23 | 6.1-r0 | fixed |
| Alpine | squid | 3.24 | 6.1-r0 | 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 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.10 | 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 | vulnerable |
| Ubuntu | squid | 22.04 | 5.7-0ubuntu0.22.04.4 | 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 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.10 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.11 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.12 | 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 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14+esm3 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14+esm4 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14+esm5 | vulnerable |
| Ubuntu | squid3 | pro | 3.5.27-1ubuntu1.14+esm6 | vulnerable |
| 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 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.10 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.11 | vulnerable |
| Ubuntu | squid | 20.04 | 4.10-1ubuntu1.12 | 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 | vulnerable |
| Ubuntu | squid | 22.04 | 5.7-0ubuntu0.22.04.4 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp4-espos | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp4-ltss | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp5-espos | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise high performance computing 15 sp5-ltss | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise server 15 sp4-ltss | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise server 15 sp5-ltss | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise server for sap applications 15 sp4 | 5.7-150400.3.41.1 | fixed |
| Suse | squid | linux enterprise server for sap applications 15 sp5 | 5.7-150400.3.41.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | squid | source | sid | 6.1-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | forky | 6.1-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | trixie | 6.1-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Alpine | squid | apk | 3.19 | 6.1-r0 | Not reported | ALPINE-CVE-2023-49288 | Not reported |
| Alpine | squid | apk | 3.20 | 6.1-r0 | Not reported | ALPINE-CVE-2023-49288 | Not reported |
| Alpine | squid | apk | 3.21 | 6.1-r0 | Not reported | ALPINE-CVE-2023-49288 | Not reported |
| Alpine | squid | apk | 3.22 | 6.1-r0 | Not reported | ALPINE-CVE-2023-49288 | Not reported |
| Alpine | squid | apk | 3.23 | 6.1-r0 | Not reported | ALPINE-CVE-2023-49288 | Not reported |
| Alpine | squid | apk | 3.24 | 6.1-r0 | Not reported | ALPINE-CVE-2023-49288 | Not reported |
| Ubuntu | squid | deb | 20.04 | 4.10-1ubuntu1.10 | Not reported | USN-6728-1 | Not reported |
| Ubuntu | squid | deb | 22.04 | 5.7-0ubuntu0.22.04.4 | Not reported | USN-6728-1 | Not reported |
| Ubuntu | squid | deb | 20.04 | 4.10-1ubuntu1.12 | Not reported | USN-6728-3 | Not reported |
| Ubuntu | squid | deb | 20.04 | 4.10-1ubuntu1.12 | Not reported | UBUNTU-CVE-2023-49288 | Not reported |
| Ubuntu | squid | deb | 22.04 | 5.7-0ubuntu0.22.04.4 | Not reported | UBUNTU-CVE-2023-49288 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp4-espos | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp4-ltss | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp5-espos | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise high performance computing 15 sp5-ltss | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise server 15 sp4-ltss | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise server 15 sp5-ltss | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise server for sap applications 15 sp4 | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
| Suse | squid | rpm | linux enterprise server for sap applications 15 sp5 | 5.7-150400.3.41.1 | Not reported | SUSE-SU-2026:4909-1 | Not reported |
Notes
[bookworm] squid: Vulnerable feature got removed upstream, workaround exists
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://access.redhat.com/errata/RHSA-2023:7668]
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2024_13631-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2023-49288]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-49288]
- [https://osv.dev/vulnerability/SUSE-SU-2026:4909-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-49288]
- [https://osv.dev/vulnerability/USN-6728-1]
- [https://osv.dev/vulnerability/USN-6728-3]
- [https://security-tracker.debian.org/tracker/CVE-2023-49288]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-1248.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]