Bug 689321 (CVE-2011-1170)

Summary:	CVE-2011-1170 kernel: ipv4: netfilter: arp_tables: fix infoleak to userspace
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:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arozansk, bhu, dhoward, jkacur, jlieskov, kernel-mgr, kmcmartin, lgoncalv, lwang, rkhan, rt-maint, tcallawa, vkrizan, williams
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 14:12:14 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:	689322, 689323, 689324, 689325, 689326
Bug Blocks:

Description Eugene Teo (Security Response) 2011-03-21 06:21:18 UTC

Structures ipt_replace, compat_ipt_replace, and xt_get_revision are copied from userspace.  Fields of these structs that are zero-terminated strings are not checked.  When they are used as argument to a format string containing "%s" in request_module(), some sensitive information is leaked to userspace via argument of spawned modprobe process.

The first bug was introduced before the git epoch;  the second is introduced by 6b7d31fc (v2.6.15-rc1);  the third is introduced by 6b7d31fc (v2.6.15-rc1).  To trigger the bug one should have CAP_NET_ADMIN.

http://marc.info/?l=netfilter&m=129978081009955&w=2

Acknowledgements:

Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.

Comment 3 Eugene Teo (Security Response) 2011-03-21 06:28:29 UTC

Proposed patch:
http://git.kernel.org/?p=linux/kernel/git/kaber/nf-next-2.6.git;a=commitdiff;h=42eab94fff18cb1091d3501cd284d6bd6cc9c143

Comment 4 Eugene Teo (Security Response) 2011-03-23 06:50:29 UTC

Statement:

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. Future kernel updates in Red Hat Enterprise Linux 5, 6 and Red Hat
Enterprise MRG may address this flaw.

Comment 5 Jiri Pirko 2011-03-25 12:02:35 UTC

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=42eab94fff18cb1091d3501cd284d6bd6cc9c143

Comment 6 errata-xmlrpc 2011-05-10 17:20:55 UTC

This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2011:0500 https://rhn.redhat.com/errata/RHSA-2011-0500.html

Comment 7 errata-xmlrpc 2011-05-19 11:58:58 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0542 https://rhn.redhat.com/errata/RHSA-2011-0542.html

Comment 8 errata-xmlrpc 2011-05-23 20:44:45 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0542 https://rhn.redhat.com/errata/RHSA-2011-0542.html

Comment 9 errata-xmlrpc 2011-05-31 14:06:39 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0833 https://rhn.redhat.com/errata/RHSA-2011-0833.html

Comment 10 errata-xmlrpc 2011-06-21 23:53:34 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6.0.Z - Server Only

Via RHSA-2011:0883 https://rhn.redhat.com/errata/RHSA-2011-0883.html