Bug 1962595 (CVE-2021-31806) - CVE-2021-31806 squid: improper input validation in HTTP Range header
Summary: CVE-2021-31806 squid: improper input validation in HTTP Range header
Alias: CVE-2021-31806
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1962596 1963385 1963386
Blocks: 1959539
TreeView+ depends on / blocked
Reported: 2021-05-20 10:43 UTC by Marian Rehak
Modified: 2022-04-17 21:24 UTC (History)
7 users (show)

Fixed In Version: squid 4.15, squid 5.0.6
Doc Type: If docs needed, set a value
Doc Text:
An incorrect input validation flaw was found in Squid, where it is vulnerable to a denial of service attack against all clients using the proxy. The highest threat from this vulnerability is to system availability.
Clone Of:
Last Closed: 2021-11-09 18:55:15 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 18:06:00 UTC

Description Marian Rehak 2021-05-20 10:43:10 UTC
Due to an incorrect input validation bug Squid is vulnerable to a Denial of Service attack against all clients using the proxy.

External Reference:


Comment 1 Marian Rehak 2021-05-20 10:43:36 UTC
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1962596]

Comment 6 errata-xmlrpc 2021-11-09 18:05:59 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 18:55:13 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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