CVE catalog
CVE-2019-12524
squid: CVE-2019-12524
- Severity
- Medium · CVSS 5.8
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.86% · Oct 25, 2026
An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.
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 |
| Ubuntu | squid3 | 18.04 | 3.5.23-5ubuntu1 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.23-5ubuntu2 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.1 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.2 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.3 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.4 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.5 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.6 | vulnerable |
| Ubuntu | squid3 | 18.04 | 3.5.27-1ubuntu1.7 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | squid | source | sid | 4.8-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | forky | 4.8-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | trixie | 4.8-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | bookworm | 4.8-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | squid3 | deb | 18.04 | 3.5.27-1ubuntu1.7 | Not reported | UBUNTU-CVE-2019-12524 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [squid]Unknown
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-cgi]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squidclient]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-common]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· all · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· all · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· all · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· all · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-openssl]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-purge]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.8-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
[Debian 13 (Trixie)]
- [squid]Unknown
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
- [squid-cgi]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
- [squidclient]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
- [squid-common]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· all · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· all · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· all · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· all · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
- [squid-openssl]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
- [squid-purge]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.8-1dsa · squid · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2020:4743]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2020_4743.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2019-12524]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2019-12524]
- [https://security-tracker.debian.org/tracker/CVE-2019-12524]
- [https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2022-1594.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]