Bug 450834 (CVE-2008-2664)

Summary: CVE-2008-2664 ruby: Unsafe use of alloca in rb_str_format()
Product: [Other] Security Response Reporter: Tomas Hoger <thoger>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: kreilly, mmcallis, tagoh
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: 1.8.6.230-1.fc9 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-07-26 06:02:50 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: 451926, 451927, 451928, 451929, 451930, 451931, 452293, 452294, 452295    
Bug Blocks:    
Attachments:
Description Flags
Drew Yao's proposed patch against ruby 1.8.5 none

Description Tomas Hoger 2008-06-11 09:38:20 UTC 
Drew Yao of the Apple Product Security team reported that the rb_str_format()
function uses alloca() memory allocation function in insecure way, causing
memory address returned by alloca() to be out of stack memory space.  This can
be used to crash and possibly execute arbitrary code with the privileges of Ruby
application which use untrusted input in string operations.

Acknowledgements:

Red Hat would like to thank Drew Yao of the Apple Product Security team for reporting this issue.
Comment 1 Tomas Hoger 2008-06-11 09:42:54 UTC 
Created attachment 308913 [details]
Drew Yao's proposed patch against ruby 1.8.5

ruby 1.9 does not use alloca in rb_str_format() any more.
Comment 5 Tomas Hoger 2008-06-20 18:52:44 UTC 
Public now, lifting embargo:
http://preview.ruby-lang.org/en/news/2008/06/20/arbitrary-code-execution-vulnerabilities

Upstream released fixed versions:
1.8.5-p231, 1.8.6-p230, 1.8.7-p22, 1.9.0-2

Patches applied upstream:
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=17460
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=17472
Comment 7 Fedora Update System 2008-06-24 03:21:26 UTC 
ruby-1.8.6.230-1.fc8 has been submitted as an update for Fedora 8
Comment 8 Fedora Update System 2008-06-24 05:18:00 UTC 
ruby-1.8.6.230-1.fc9 has been submitted as an update for Fedora 9
Comment 9 Fedora Update System 2008-06-25 02:50:43 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 02:52:18 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 11 Red Hat Product Security 2008-07-21 09:30:23 UTC 
This issue was addressed in:

Red Hat Enterprise Linux:
  http://rhn.redhat.com/errata/RHSA-2008-0561.html
  http://rhn.redhat.com/errata/RHSA-2008-0562.html

Fedora:
  https://admin.fedoraproject.org/updates/F8/FEDORA-2008-5649
  https://admin.fedoraproject.org/updates/F9/FEDORA-2008-5664