Bug 1334241 – CVE-2016-4554 squid: Header Smuggling issue in HTTP Request processing

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Bug 1334241 - (CVE-2016-4554, SQUID-2016:8) CVE-2016-4554 squid: Header Smuggling issue in HTTP Request processing

Summary:	CVE-2016-4554 squid: Header Smuggling issue in HTTP Request processing

Status:	CLOSED ERRATA

Aliases:	CVE-2016-4554, SQUID-2016:8

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20160506,repor...
Keywords:	Security

Depends On:	1334251 1334489 1334490 1334491 1334492 1334499 1334500
Blocks:	1334247
	Show dependency tree / graph

Reported:	2016-05-09 05:09 EDT by Andrej Nemec
Modified:	2016-08-24 19:24 EDT (History)
CC List:	8 users (show)

See Also:
Fixed In Version:	squid 3.5.18
Doc Type:	Bug Fix
Doc Text:	An input validation flaw was found in Squid's mime_get_header_field() function, which is used to search for headers within HTTP requests. An attacker could send an HTTP request from the client side with specially crafted header Host header that bypasses same-origin security protections, causing Squid operating as interception or reverse-proxy to contact the wrong origin server. It could also be used for cache poisoning for client not following RFC 7230.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-06-09 08:43:31 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:1138	normal	SHIPPED_LIVE	Moderate: squid security update	2016-05-31 05:56:15 EDT
Red Hat Product Errata	RHSA-2016:1139	normal	SHIPPED_LIVE	Moderate: squid security update	2016-05-31 05:42:41 EDT
Red Hat Product Errata	RHSA-2016:1140	normal	SHIPPED_LIVE	Moderate: squid34 security update	2016-05-31 05:56:07 EDT

Groups: None (edit)

Description Andrej Nemec 2016-05-09 05:09:37 EDT

Due to incorrect input validation Squid is vulnerable to a header smuggling attack leading to cache poisoning and to bypass of same-origin security policy in Squid and some client browsers.

External references:

http://www.squid-cache.org/Advisories/SQUID-2016_8.txt

Upstream fixes:

[RHEL-7]:

http://www.squid-cache.org/Versions/v3/3.3/changesets/SQUID-2016_8.patch>

[RHEL-6]:

http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID-2016_8.patch

[Fedora-22]:

http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_8.patch

[Fedora-23]:

http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_8.patch

Comment 1 Andrej Nemec 2016-05-09 05:20:43 EDT

Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1334251]

Comment 4 errata-xmlrpc 2016-05-31 01:43:17 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:1139 https://access.redhat.com/errata/RHSA-2016:1139

Comment 5 errata-xmlrpc 2016-05-31 01:57:00 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:1140 https://access.redhat.com/errata/RHSA-2016:1140

Comment 6 errata-xmlrpc 2016-05-31 01:57:51 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:1138 https://access.redhat.com/errata/RHSA-2016:1138

Comment 7 Fedora Update System 2016-07-12 16:27:41 EDT

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 8 Fedora Update System 2016-07-12 19:52:23 EDT

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 9 Doran Moppert 2016-08-24 19:24:46 EDT

This issue has now been publicised as "Host of troubles" aka Cert VU#916855.  Red Hat products were patched in May and July, no further action is needed.

External URL:  https://hostoftroubles.com/

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