CVEvulnerability

CVE-2019-12523

9.1 CRITICAL Published 2019-11-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-11-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0 ([email protected])
6.4 MEDIUM — AV:N/AC:L/Au:N/C:P/I:P/A:N

Description

An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.

Affected configurations

• squid-cache squid (>= 3.0 <= 3.5.28) • squid-cache squid (>= 4.0 <= 4.8) • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 19.04 • canonical ubuntu linux 19.10 • fedoraproject fedora 30 • fedoraproject fedora 31 • opensuse leap 15.0 • debian debian linux 9.0 • debian debian linux 10.0

References