Bug 1770365 (CVE-2019-18677)

Summary: CVE-2019-18677 squid: Cross-Site Request Forgery issue in HTTP Request processing
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anon.amish, code, jonathansteffan, luhliari, uwe.knop, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: squid 4.9 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-11-04 02:23:03 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1770367, 1771279, 1771280    
Bug Blocks: 1770369    

Description Pedro Sampaio 2019-11-08 19:56:48 UTC
Due to incorrect message processing Squid configured with append_domain can inappropriately redirect traffic to origins it should not be delivered to.

References:

http://www.squid-cache.org/Advisories/SQUID-2019_9.txt

Comment 1 Pedro Sampaio 2019-11-08 19:57:05 UTC
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1770367]

Comment 3 Huzaifa S. Sidhpurwala 2019-11-12 05:45:35 UTC
External References:

http://www.squid-cache.org/Advisories/SQUID-2019_9.txt

Comment 4 Huzaifa S. Sidhpurwala 2019-11-12 05:45:40 UTC
Mitigation:

As per upstream:

Remove append_domain configuration settings from squid.conf.
The append_domain feature is redundant when /etc/resolv.conf  is used to determine hostnames. However, please note that use of /etc/resolv.conf may require removal of dns_nameservers and other redundant DNS directives.

Comment 6 Product Security DevOps Team 2020-11-04 02:23:03 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-2019-18677

Comment 7 errata-xmlrpc 2020-11-04 03:31:21 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4743 https://access.redhat.com/errata/RHSA-2020:4743