CVE-2021-28652

MEDIUM

Squid < 4.15 - Memory Leak

Title source: rule

Description

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This attack is limited to clients with Cache Manager API access privilege.

References (8)

[Mailing List, Third Party Advisory] http://seclists.org/fulldisclosure/2023/Oct/14

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2023/10/11/3

[Exploit, Issue Tracking, Vendor Advisory] https://bugs.squid-cache.org/show_bug.cgi?id=5106

[Patch, Third Party Advisory] https://github.com/squid-cache/squid/security/advisories/GHSA-m47m-9hvw-7447

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html

[Third Party Advisory] https://www.debian.org/security/2021/dsa-4924

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/

Scores

CVSS v3 4.9

EPSS 0.0054

EPSS Percentile 67.3%

Attack Vector NETWORK

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

Classification

CWE

CWE-401

Status published

Affected Products (5)

squid-cache/squid < 4.15

debian/debian_linux

debian/debian_linux

fedoraproject/fedora

fedoraproject/fedora

Timeline

Published May 27, 2021

Tracked Since Feb 18, 2026