Bug 1323594 (CVE-2016-3948)

Summary: CVE-2016-3948 squid: denial of service issue in HTTP response processing
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cbuissar, henrik, jonathansteffan, luhliari, psimerda, thozza
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: squid 3.5.16 Doc Type: Bug Fix
Doc Text:
An incorrect boundary check was found in the way squid handled the Vary header in HTTP responses, which could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response.
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-11-04 09:03:46 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1322770, 1323591    
Bug Blocks: 1323611    

Description Andrej Nemec 2016-04-04 07:50:34 UTC
Due to incorrect bounds checking Squid is vulnerable to a denial of service attack when processing HTTP responses.

External references:


Upstream fix:




Comment 2 Cedric Buissart 2016-04-07 09:21:20 UTC

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. 

For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Comment 4 Fedora Update System 2016-07-12 20:28:09 UTC
squid-3.5.19-2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-07-12 23:52:51 UTC
squid-3.5.10-4.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 errata-xmlrpc 2016-11-03 21:17:19 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2600 https://rhn.redhat.com/errata/RHSA-2016-2600.html