CVE catalog
CVE-2019-12526
squid: CVE-2019-12526
- Severity
- High · CVSS 8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 20.25% · Oct 25, 2026
An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap.
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 | 16.04 | 3.3.8-1ubuntu16 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.3.8-1ubuntu17 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu6 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.1 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.2 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.3 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.4 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.5 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.6 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.7 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.8 | vulnerable |
| Ubuntu | squid3 | 16.04 | 3.5.12-1ubuntu7.9 | 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 | fixed |
| Ubuntu | squid | 20.04 | 4.8-1ubuntu2 | vulnerable |
| Ubuntu | squid | 20.04 | 4.8-1ubuntu3 | vulnerable |
| Ubuntu | squid | 20.04 | 4.9-2ubuntu1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | squid | source | sid | 4.9-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | forky | 4.9-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | trixie | 4.9-1 | not yet assigned | Not reported | Not reported |
| Debian | squid | source | bookworm | 4.9-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | squid3 | deb | 16.04 | 3.5.12-1ubuntu7.9 | Not reported | UBUNTU-CVE-2019-12526 | Not reported |
| Ubuntu | squid3 | deb | 18.04 | 3.5.27-1ubuntu1.4 | Not reported | UBUNTU-CVE-2019-12526 | Not reported |
| Ubuntu | squid | deb | 20.04 | 4.9-2ubuntu1 | Not reported | UBUNTU-CVE-2019-12526 | 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:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-cgi]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squidclient]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-common]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· all · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· all · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· all · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· all · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-openssl]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
- [squid-purge]Unknown
Source package: [squid]
Details (4)
5.7-2+deb12u5· amd64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u5· arm64 · bookwormFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· amd64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
5.7-2+deb12u6· arm64 · bookworm-securityFixed · Fixed:
4.9-1dsa · squid · debian · bookworm; dsa · squid · debian · 12
[Debian 13 (Trixie)]
- [squid]Unknown
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
- [squid-cgi]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
- [squidclient]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
- [squid-common]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· all · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· all · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· all · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· all · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
- [squid-openssl]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
- [squid-purge]Unknown
Source package: [squid]
Details (4)
6.13-2+deb13u2· amd64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixieFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
4.9-1dsa · squid · debian · 13
6.13-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
4.9-1dsa · 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-2019-12526]
- [https://osv.dev/vulnerability/DLA-2028-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2019-12526]
- [https://security-tracker.debian.org/tracker/CVE-2019-12526]
- [https://wid.cert-bund.de/.well-known/csaf/white/2019/wid-sec-w-2023-1391.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]