Bug 1962246 (CVE-2021-28652) - CVE-2021-28652 squid: denial of service issue in Cache Manager
Summary: CVE-2021-28652 squid: denial of service issue in Cache Manager
Alias: CVE-2021-28652
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1963363 Red Hat1963364 Red Hat1963365
Blocks: Embargoed1959539
TreeView+ depends on / blocked
Reported: 2021-05-19 15:10 UTC by Mauro Matteo Cascella
Modified: 2022-04-17 21:23 UTC (History)
5 users (show)

Fixed In Version: squid 4.15, squid 5.0.6
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Squid. A parser validation bug could allow a trusted client with Cache Manager API access privileges to trigger memory leaks, potentially resulting in a denial of service against Squid. The highest threat from this vulnerability is to system availability.
Clone Of:
Last Closed: 2021-11-09 18:53:44 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4292 0 None None None 2021-11-09 18:05:51 UTC

Description Mauro Matteo Cascella 2021-05-19 15:10:31 UTC
Due to an incorrect parser validation bug Squid is vulnerable to a Denial of Service attack against the Cache Manager API. This problem allows a trusted client to trigger memory leaks which over time lead to a Denial of Service against Squid and the machine it is operating on. This attack is limited to clients with Cache Manager API access privilege.

Upstream security advisory:

Comment 1 Mauro Matteo Cascella 2021-05-22 17:34:35 UTC
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1963363]

Comment 6 errata-xmlrpc 2021-11-09 18:05:50 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4292 https://access.redhat.com/errata/RHSA-2021:4292

Comment 7 Product Security DevOps Team 2021-11-09 18:53:41 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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