Bug 664544 - (CVE-2010-4565) CVE-2010-4565 kernel: CAN info leak
CVE-2010-4565 kernel: CAN info leak
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
Unspecified Unspecified
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20101102,reported=2...
: Security
Depends On: 664559 664560 664561
Blocks:
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Reported: 2010-12-20 13:05 EST by Petr Matousek
Modified: 2015-08-19 05:01 EDT (History)
10 users (show)

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Doc Type: Bug Fix
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Last Closed: 2015-07-29 09:32:31 EDT
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Description Petr Matousek 2010-12-20 13:05:23 EST
Description of problem:
In bcm_connect() (in net/can/bcm.c), there is the following code:

 sprintf(bo->procname, "%p", sock);

The CAN protocol uses the address of a kernel heap object sock as a proc
filename, revealing information that could be useful during
exploitation.

Reference:
http://seclists.org/oss-sec/2010/q4/103
http://www.spinics.net/lists/netdev/msg145791.html

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.
Comment 1 Petr Matousek 2010-12-20 13:09:21 EST
Statement:

The Linux kernel as shipped with Red Hat Enterprise Linux 3, 4 and 5 did not
include CAN bus subsystem support, and therefore are not affected by this
issue. 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 Eugene Teo (Security Response) 2010-12-29 00:18:40 EST
Patch: http://www.spinics.net/lists/netdev/msg151020.html
Comment 6 errata-xmlrpc 2011-03-10 15:05:01 EST
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 7 errata-xmlrpc 2011-05-10 14:11:25 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0498 https://rhn.redhat.com/errata/RHSA-2011-0498.html

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