CVE-2019-12523 - CVE House
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Status published Critical CVE-2019-12523

An issue was discovered in Squid before 4.9. When handling...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2024-45802
Squid Denial of Service
High 7.5
CVE-2024-37894
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CVE-2024-25617
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Medium 5.3

Affected Vendor

squid-cache

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Affected Software

squid, ubuntu linux, fedora, leap, debian linux
Vulnerable Versions:
3.0, 4.0, 16.04, 18.04, 19.04, 19.10, 30, 31, 15.0, 9.0, 10.0

Timeline

Official Publish: November 26th, 2019
Last Modified: August 4th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.