Bug 689327 (CVE-2011-1171) - CVE-2011-1171 kernel: ipv4: netfilter: ip_tables: fix infoleak to userspace
Summary: CVE-2011-1171 kernel: ipv4: netfilter: ip_tables: fix infoleak to userspace
Status: CLOSED ERRATA
Alias: CVE-2011-1171
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: public=20110310,reported=20110321,sou...
Keywords: Security
Depends On: 689331 689332 689333 689334 689335
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-21 06:35 UTC by Eugene Teo (Security Response)
Modified: 2019-06-08 18:46 UTC (History)
15 users (show)

(edit)
Clone Of:
(edit)
Last Closed: 2015-07-29 14:12:39 UTC


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0500 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2011-05-10 17:18:23 UTC
Red Hat Product Errata RHSA-2011:0542 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update 2011-05-19 11:58:07 UTC
Red Hat Product Errata RHSA-2011:0833 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-05-31 14:05:42 UTC
Red Hat Product Errata RHSA-2011:0883 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-06-21 23:52:55 UTC

Description Eugene Teo (Security Response) 2011-03-21 06:35:08 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 and the third bugs were introduced before the git epoch; the second was introduced in 2722971c (v2.6.17-rc1).  To trigger the bug one should have CAP_NET_ADMIN.

http://marc.info/?l=linux-kernel&m=129978077609894&w=2

Acknowledgements:

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

Proposed patch:

http://git.kernel.org/?p=linux/kernel/git/kaber/nf-next-2.6.git;a=commitdiff;h=78b79876761b86653df89c48a7010b5cbd41a84a

Comment 3 Eugene Teo (Security Response) 2011-03-23 06:49:36 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 errata-xmlrpc 2011-05-10 17:20:58 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 6 errata-xmlrpc 2011-05-19 11:59:01 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 7 errata-xmlrpc 2011-05-23 20:44:48 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 2011-05-31 14:06:46 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 9 errata-xmlrpc 2011-06-21 23:53:38 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


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