Bug 646725 (CVE-2010-3861)

Summary: CVE-2010-3861 kernel: heap contents leak from ETHTOOL_GRXCLSRLALL
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, davej, dhoward, fhrbata, jkacur, jpirko, kmcmartin, lgoncalv, lwang, plyons, tcallawa, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2013-05-08 17:34:25 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 646726, 646727, 646728, 647417, 647418, 647419, 647420    
Bug Blocks:    

Description Eugene Teo (Security Response) 2010-10-26 03:30:16 UTC 
Description of problem:
Calling ETHTOOL_GRXCLSRLALL with a large rule_cnt will allocate kernel heap without clearing it. For the one driver (niu) that implements it, it will leave the unused portion of heap unchanged and copy the full contents back to userspace.

This is different from CVE-2010-2478, but was introduced at the same time
(0853ad66, 2.6.27-rc1).

Upstream commit:
http://git.kernel.org/linus/ae6df5f96a51818d6376da5307d773baeece4014

Acknowledgements:

Red Hat would like to thank Kees Cook for reporting this issue.
Comment 2 Eugene Teo (Security Response) 2010-10-26 03:44:44 UTC 
This is a follow-up of CVE-2010-2478. Also see https://bugzilla.redhat.com/show_bug.cgi?id=608950#c2.

Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 3 and 4, as they do not include support for the Neptune
Ethernet driver. It did not affect Red Hat Enterprise Linux 5 as it did not contain the upstream commit 0853ad66 that introduced this flaw.
Comment 4 errata-xmlrpc 2010-12-08 19:09:39 UTC 
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2010:0958 https://rhn.redhat.com/errata/RHSA-2010-0958.html
Comment 5 errata-xmlrpc 2011-01-11 19:45:39 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0007 https://rhn.redhat.com/errata/RHSA-2011-0007.html