Bug 1827563 (CVE-2020-11945) - CVE-2020-11945 squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution
Summary: CVE-2020-11945 squid: improper access restriction upon Digest Authentication ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-11945
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1827564 1828359 1828361 1828363 1828365 1828367 1828369
Blocks: 1827553
TreeView+ depends on / blocked
 
Reported: 2020-04-24 08:19 UTC by Marian Rehak
Modified: 2023-09-07 22:57 UTC (History)
7 users (show)

Fixed In Version: squid 4.11, squid 5.0.2
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Squid, where a remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This issue occurs because the attacker can overflow the nonce reference counter, which results in remote code execution if the pooled token credentials are freed.
Clone Of:
Environment:
Last Closed: 2020-05-06 16:32:00 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:2038 0 None None None 2020-05-06 12:14:32 UTC
Red Hat Product Errata RHSA-2020:2039 0 None None None 2020-05-06 13:24:26 UTC
Red Hat Product Errata RHSA-2020:2040 0 None None None 2020-05-06 13:48:36 UTC
Red Hat Product Errata RHSA-2020:2041 0 None None None 2020-05-06 13:48:12 UTC

Description Marian Rehak 2020-04-24 08:19:57 UTC 
A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter, which may result in Remote code execution if the pooled token credentials are freed.
Comment 1 Marian Rehak 2020-04-24 08:20:26 UTC 
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1827564]
Comment 2 Marian Rehak 2020-04-24 08:20:44 UTC 
Upstream Fix:

https://github.com/squid-cache/squid/pull/585
Comment 3 Stefan Cornelius 2020-04-24 12:13:54 UTC 
External References:

http://www.squid-cache.org/Advisories/SQUID-2020_4.txt
Comment 8 errata-xmlrpc 2020-05-06 12:14:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:2038 https://access.redhat.com/errata/RHSA-2020:2038
Comment 9 errata-xmlrpc 2020-05-06 13:24:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:2039 https://access.redhat.com/errata/RHSA-2020:2039
Comment 10 errata-xmlrpc 2020-05-06 13:48:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:2041 https://access.redhat.com/errata/RHSA-2020:2041
Comment 11 errata-xmlrpc 2020-05-06 13:48:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:2040 https://access.redhat.com/errata/RHSA-2020:2040
Comment 12 Product Security DevOps Team 2020-05-06 16:32:00 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-11945
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