Bug 1357920 (CVE-2016-1000108)

Summary:	CVE-2016-1000108 yaws: sets environmental variable based on user supplied Proxy request header
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	devel, filip, lemenkov, lkundrak
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-07-19 15:12:19 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1357922, 1357923
Bug Blocks:

Description Adam Mariš 2016-07-19 15:10:30 UTC

Many software projects and vendors have implemented support for the “Proxy” request header in their respective CGI implementations and languages by creating the “HTTP_PROXY” environmental variable based on the header value. When this variable is used (in many cases automatically by various HTTP client libraries) any outgoing requests generated in turn from the attackers original request can be redirected to an attacker controlled proxy. This allows attackers to view potentially sensitive information, reply with malformed data, or to hold connections open causing a potential denial of service.

Known via:

http://seclists.org/oss-sec/2016/q3/95

Comment 1 Adam Mariš 2016-07-19 15:10:39 UTC

Acknowledgments:

Name: Scott Geary (VendHQ)

Comment 2 Adam Mariš 2016-07-19 15:11:04 UTC

Created yaws tracking bugs for this issue:

Affects: fedora-all [bug 1357922]
Affects: epel-7 [bug 1357923]