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CVE-2019-18676

nvd nist
Published: Nov 26, 2019Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

Description

An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.

Affected (11)

Show all products
1 product
Squid
1 product
Ubuntu Linux
1 product
Fedora
1 product
Debian Linux
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Squid Cache
From 3.0 to 3.5.28
From 4.0 to 4.8
Configuration B
3 vulnerable
Vulnerable SoftwareAffected Versions
Canonical
Version 16.04
Version 19.04
Version 19.10
Configuration C
2 vulnerable
Vulnerable SoftwareAffected Versions
Fedoraproject
Version 30
Version 31
Configuration D
2 vulnerable
Vulnerable SoftwareAffected Versions
Debian
Version 10.0
Version 9.0
Configuration E
2 vulnerable
Vulnerable SoftwareAffected Versions
Canonical
Version 16.04
Version 18.04

References (20)

Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
Issue TrackingThird Party Advisory
Source: cve@mitre.org
PatchThird Party Advisory
Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

Timeline

No history available yet.