Bug 443829 (CVE-2008-1891)

Summary:	CVE-2008-1891 ruby: WEBrick CGI source disclosure
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	kreilly, tagoh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1891
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-06-10 19:24:37 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:	452293, 452294, 452295
Bug Blocks:

Description Tomas Hoger 2008-04-23 15:52:48 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2008-1891 to the following vulnerability:

Directory traversal vulnerability in WEBrick in Ruby 1.9.0 and earlier, when using NTFS or FAT filesystems, allows remote attackers to read arbitrary CGI files via a trailing (1) + (plus), (2) %2b (encoded plus), (3) . (dot), (4) %2e (encoded dot), or (5) %20 (encoded space) character in the URI, possibly related to the WEBrick::HTTPServlet::FileHandler and WEBrick::HTTPServer.new functionality and the :DocumentRoot option.

Refences:
http://aluigi.altervista.org/adv/webrickcgi-adv.txt
http://www.frsirt.com/english/advisories/2008/1245/references
http://secunia.com/advisories/29794
http://xforce.iss.net/xforce/xfdb/41824

Comment 1 Tomas Hoger 2008-04-23 15:58:59 UTC

This issue only affects systems where Ruby WEBrick is used to serve content from
certain filesystems that treat certain file names as identical (e.g.
'file.name.' is same file as 'file.name').  Out of the mentioned filesystems,
only FAT in supported by Red Hat Enterprise Linux, but it's unlikely to be used
in a real deployments as storage for web content.

Ruby packages as shipped in Red Hat Enterprise Linux 2.1 and 3 do not contain
WEBrick and therefore are not affected by this problem.

Comment 4 Tomas Hoger 2008-06-11 09:58:48 UTC

Patch applied in ruby SVN trunk:

http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=16453

Comment 9 Fedora Update System 2008-06-25 02:50:51 UTC

ruby-1.8.6.230-1.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2008-06-25 02:52:07 UTC

ruby-1.8.6.230-1.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 15 Fedora Update System 2008-07-26 06:02:23 UTC

ruby-1.8.6.230-1.fc9 has been pushed to the Fedora 9 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 16 Josh Bressers 2009-06-10 19:10:36 UTC

The risks associated with fixing this flaw outweigh the benefits of the fix. Red Hat does not plan to fix this flaw in Red Hat Enterprise Linux.