Bug 678913 (CVE-2011-1004)

Summary:	CVE-2011-1004 Ruby: Symlink race condition by removing directory trees in fileutils module
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amarecek, jeremy, mjc, mmorsi, mtasaka, tagoh, vanmeeuwen+fedora, vdanen, vondruch, ybabar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-06-29 14:34:14 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:	709957, 709958, 709963, 709964
Bug Blocks:

Description Jan Lieskovsky 2011-02-20 19:16:33 UTC

A race condition was found in the way the secure
implementation of Ruby fileutils' remove system
entries method (remove_entry_secure()), removed
directory trees. A local attacker could use this
flaw to conduct symbolic link attacks, leading to
removal of arbitrary files or directories on the system.

References:
[1] http://www.ruby-lang.org/en/news/2011/02/18/fileutils-is-vulnerable-to-symlink-race-attacks/

Upstream patch (against trunk):
[2] http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=30896

Comment 1 Jan Lieskovsky 2011-02-20 19:21:21 UTC

This issue did NOT affect the versions of the ruby package, as shipped
with Red Hat Enterprise Linux 3 or 4, as those versions do not include
support for remove_entry_secure() method yet.

This issue affects the versions of the ruby package, as shipped with
Red Hat Enterprise Linux 5 and 6.

--

This issue affects the version of the ruby package, as shipped with 
Fedora release of 13.

Particular ruby package update for Fedora release of 14 has been already
scheduled. Upon testing phase, it will be pushed to Fedora 14 stable
repository.

Comment 2 Jan Lieskovsky 2011-02-21 12:51:14 UTC

CVE Request:
[3] http://www.openwall.com/lists/oss-security/2011/02/21/2

Comment 3 Jan Lieskovsky 2011-02-22 08:43:00 UTC

The CVE identifier of CVE-2011-1004 has been assigned to this issue:
[4] http://www.openwall.com/lists/oss-security/2011/02/21/5

Comment 14 errata-xmlrpc 2011-06-28 17:33:27 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0910 https://rhn.redhat.com/errata/RHSA-2011-0910.html

Comment 15 errata-xmlrpc 2011-06-28 17:33:59 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0909 https://rhn.redhat.com/errata/RHSA-2011-0909.html

Comment 16 Vincent Danen 2011-06-29 14:28:48 UTC

Statement:

(none)