Bug 664544 (CVE-2010-4565)

Summary:	CVE-2010-4565 kernel: CAN info leak
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arozansk, bhu, fhrbata, jkacur, kmcmartin, lgoncalv, lwang, tcallawa, vkrizan, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-07-29 13:32:31 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:	664559, 664560, 664561
Bug Blocks:

Description Petr Matousek 2010-12-20 18:05:23 UTC

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 18:09:21 UTC

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 05:18:40 UTC

Patch: http://www.spinics.net/lists/netdev/msg151020.html

Comment 5 Eugene Teo (Security Response) 2011-01-05 05:09:58 UTC

(In reply to comment #4)
> Patch: http://www.spinics.net/lists/netdev/msg151020.html

http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commitdiff;h=9f260e0efa4766e56d0ac14f1aeea6ee5eb8fe83

Comment 6 errata-xmlrpc 2011-03-10 20:05:01 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 7 errata-xmlrpc 2011-05-10 18:11:25 UTC

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