Bug 1094265 (CVE-2014-0181) - CVE-2014-0181 kernel: net: insufficient permision checks of netlink messages
Summary: CVE-2014-0181 kernel: net: insufficient permision checks of netlink messages
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2014-0181
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1094266 1094267 1094268 1094269 1094270 1094271 1094272 1097660 1097661
Blocks: 1094273
TreeView+ depends on / blocked
 
Reported: 2014-05-05 11:40 UTC by Petr Matousek
Modified: 2023-05-12 03:25 UTC (History)
37 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was found that the permission checks performed by the Linux kernel when a netlink message was received were not sufficient. A local, unprivileged user could potentially bypass these restrictions by passing a netlink socket as stdout or stderr to a more privileged process and altering the output of this process.
Clone Of:
Environment:
Last Closed: 2014-12-04 17:37:49 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:0913 0 normal SHIPPED_LIVE Important: kernel-rt security update 2014-07-22 22:00:11 UTC
Red Hat Product Errata RHSA-2014:1023 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2014-08-06 21:10:29 UTC
Red Hat Product Errata RHSA-2014:1392 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2014-10-14 01:28:44 UTC
Red Hat Product Errata RHSA-2014:1959 0 normal SHIPPED_LIVE Moderate: kernel security and bug fix update 2014-12-04 22:11:55 UTC

Description Petr Matousek 2014-05-05 11:40:36 UTC 
It is possible to reconfigure the network on Linux by calling write(2)
on an appropriately connected network socket. An unprivileged local
user could use this flaw to reconfigure the network by passing such a
socket as stdout or stderr to a setuid program.

References:
http://seclists.org/oss-sec/2014/q2/162

Upstream commit:
https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=90f62cf30a78721641e08737bda787552428061e
(depends on some of the preceding commits; whole set on http://www.spinics.net/lists/netdev/msg280198.html)

Acknowledgements:

Red Hat would like to thank Andy Lutomirski for reporting this issue.
Comment 3 Petr Matousek 2014-05-05 11:43:20 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1094270]
Comment 5 Petr Matousek 2014-05-08 18:52:28 UTC 
Discussion about regression caused by the patch for CVE-2014-0181 --

  http://www.spinics.net/lists/netdev/msg281707.html
Comment 6 John Kacur 2014-05-09 12:41:31 UTC 
Upstream versions of the patches (Linus' tree)

Patch 1: 5187cd055b6e81fc6526109456f8b20623148d5f
Patch 2: a53b72c83a4216f2eb883ed45a0cbce014b8e62d
Patch 3: a3b299da869d6e78cf42ae0b1b41797bcb8c5e4b
Patch 4: aa4cf9452f469f16cea8c96283b641b4576d4a7b
Patch 5: 90f62cf30a78721641e08737bda787552428061e
Comment 7 Fedora Update System 2014-05-10 03:20:43 UTC 
kernel-3.14.3-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 8 Ed Brand 2014-05-13 13:12:21 UTC 
Are the RHEL-5/RHEL-6 kernels impacted by this issue?
Comment 9 Petr Matousek 2014-05-14 09:23:02 UTC 
Statement:

(none)
Comment 13 Fedora Update System 2014-05-21 23:22:33 UTC 
kernel-3.14.4-100.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 14 Jiri Benc 2014-05-27 07:49:58 UTC 
The regression mentioned in comment 5 is still discussed upstream. There has been an RFC patch sent which seems to be in the right direction but still needs more work.
Comment 15 Petr Matousek 2014-06-02 06:36:24 UTC 
(In reply to Jiri Benc from comment #14)
> The regression mentioned in comment 5 is still discussed upstream. There has
> been an RFC patch sent which seems to be in the right direction but still
> needs more work.

http://www.spinics.net/lists/netdev/msg284505.html
Comment 16 Jiri Benc 2014-06-03 08:49:08 UTC 
Upstream commit

2d7a85f4b06e netlink: Only check file credentials for implicit destinations
Comment 17 errata-xmlrpc 2014-07-22 18:00:51 UTC 
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0913 https://rhn.redhat.com/errata/RHSA-2014-0913.html
Comment 18 Martin Prpič 2014-08-05 12:07:58 UTC 
IssueDescription:

It was found that the permission checks performed by the Linux kernel when a netlink message was received were not sufficient. A local, unprivileged user could potentially bypass these restrictions by passing a netlink socket as stdout or stderr to a more privileged process and altering the output of this process.
Comment 19 errata-xmlrpc 2014-08-06 17:11:20 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1023 https://rhn.redhat.com/errata/RHSA-2014-1023.html
Comment 20 errata-xmlrpc 2014-10-14 06:07:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1392 https://rhn.redhat.com/errata/RHSA-2014-1392.html
Comment 22 errata-xmlrpc 2014-12-04 17:12:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:1959 https://rhn.redhat.com/errata/RHSA-2014-1959.html
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