Bug 672420 (CVE-2010-4656)

Summary: CVE-2010-4656 kernel: iowarrior usb device heap overflow
Product: [Other] Security Response Reporter: Eugene Teo (Security Response) <eteo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: arozansk, bhu, dhoward, jkacur, kernel-mgr, kmcmartin, lgoncalv, lwang, rt-maint, tcallawa, vkrizan, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2015-07-29 13:41:54 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 672421, 672422, 672423    
Bug Blocks:    

Description Eugene Teo (Security Response) 2011-01-25 04:02:29 UTC 
If the iowarrior devices in this case statement support more than 8 bytes per report, it is possible to write past the end of a kernel heap allocation. This will probably never be possible, but change the allocation to be more defensive anyway.

Upstream commit:
http://git.kernel.org/linus/3ed780117dbe5acb64280d218f0347f238dafed0

Acknowledgements:

Red Hat would like to thank Kees Cook for reporting this issue.
Comment 3 Eugene Teo (Security Response) 2011-01-25 05:16:59 UTC 
Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 4 and 5 as they do not have support for the I/O-Warrior USB devices. This has been addressed in Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0330.html. A future kernel update in Red Hat Enterprise Linux 6 may address this flaw.
Comment 4 errata-xmlrpc 2011-03-10 20:05:15 UTC 
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2011:0330 https://rhn.redhat.com/errata/RHSA-2011-0330.html
Comment 5 errata-xmlrpc 2011-04-08 02:57:38 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0421 https://rhn.redhat.com/errata/RHSA-2011-0421.html