Bug 646725 - (CVE-2010-3861) CVE-2010-3861 kernel: heap contents leak from ETHTOOL_GRXCLSRLALL
CVE-2010-3861 kernel: heap contents leak from ETHTOOL_GRXCLSRLALL
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
Unspecified Unspecified
medium Severity medium
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Assigned To: Red Hat Product Security
reported=20101026,public=20101008,sou...
: Security
Depends On: 646726 646727 646728 647417 647418 647419 647420
Blocks:
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Reported: 2010-10-25 23:30 EDT by Eugene Teo (Security Response)
Modified: 2015-07-31 02:33 EDT (History)
13 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-05-08 13:34:25 EDT
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Description Eugene Teo (Security Response) 2010-10-25 23:30:16 EDT
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) 2010-10-25 23:44:44 EDT
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 14:09:39 EST
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 14:45:39 EST
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

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