Bug 667916 (CVE-2010-4649, CVE-2011-1044)

Summary:	CVE-2010-4649 CVE-2011-1044 kernel: IB/uverbs: Handle large number of entries in poll CQ
Product:	[Other] Security Response	Reporter:	Eugene Teo (Security Response) <eteo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	arozansk, kernel-mgr, kmcmartin, lwang, pmatouse, tcallawa, vkrizan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-07-29 13:38:33 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:	668368, 668369, 668370, 668371, 668372, 688429, 696137
Bug Blocks:

Description Eugene Teo (Security Response) 2011-01-07 09:20:21 UTC

In ib_uverbs_poll_cq() code there is a potential integer overflow if
userspace passes in a large cmd.ne.  The calls to kmalloc() would
allocate smaller buffers than intended, leading to memory corruption.
There iss also an information leak if resp wasn't all used.
Unprivileged userspace may call this function, although only if an
RDMA device that uses this function is present.

Fix this by copying CQ entries one at a time, which avoids the
allocation entirely, and also by moving this copying into a function
that makes sure to initialize all memory copied to userspace.

Upstream commit:
http://git.kernel.org/linus/7182afea8d1afd432a17c18162cc3fd441d0da93

Comment 3 Eugene Teo (Security Response) 2011-02-21 03:41:16 UTC

Update:
Name: CVE-2010-4649
Integer overflow in the ib_uverbs_poll_cq function in drivers/infiniband/core/uverbs_cmd.c in the Linux kernel before 2.6.37 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact via a large value of a certain structure member.

Name: CVE-2011-1044
The ib_uverbs_poll_cq function in drivers/infiniband/core/uverbs_cmd.c in the Linux kernel before 2.6.37 does not initialize a certain response buffer, which allows local users to obtain potentially sensitive information from kernel memory via vectors that cause this buffer to be only partially filled, a different vulnerability than CVE-2010-4649.

Both CVE names are assigned for the same patch that we are going to address in our kernels. Thanks.

Comment 4 errata-xmlrpc 2011-03-10 20:04:26 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 6 Eugene Teo (Security Response) 2011-03-17 11:34:18 UTC

Statement CVE-2011-1044:

This issue affects the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 4, 5, 6, and Red Hat Enterprise MRG. Red Hat Enterprise Linux
4 is now in Production 3 of the maintenance life-cycle,
https://access.redhat.com/support/policy/updates/errata/, therefore the fix for
this issue is not currently planned to be included in the future updates. This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0927.html and https://rhn.redhat.com/errata/RHSA-2011-0498.html, and https://rhn.redhat.com/errata/RHSA-2011-0330.html.

Statement CVE-2010-4649:

This issue affects the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 4, 5, 6, and Red Hat Enterprise MRG. Red Hat Enterprise Linux
4 is now in Production 3 of the maintenance life-cycle,
https://access.redhat.com/support/policy/updates/errata/, therefore the fix for
this issue is not currently planned to be included in the future updates. This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0927.html and https://rhn.redhat.com/errata/RHSA-2011-0498.html, and https://rhn.redhat.com/errata/RHSA-2011-0330.html.

Comment 8 errata-xmlrpc 2011-05-10 18:10:17 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

Comment 9 errata-xmlrpc 2011-07-15 06:08:26 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0927 https://rhn.redhat.com/errata/RHSA-2011-0927.html