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Bug 1436649 - (CVE-2017-2671) CVE-2017-2671 kernel: ping socket / AF_LLC connect() sin_family race
CVE-2017-2671 kernel: ping socket / AF_LLC connect() sin_family race
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170324,repor...
: Security
: 1436658 (view as bug list)
Depends On: 1439000 1439001 1436663 1438998 1438999 1447842 1447843 1447844
Blocks: 1436651 1436660
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Reported: 2017-03-28 07:39 EDT by Martin Prpič
Modified: 2018-08-28 18:14 EDT (History)
37 users (show)

See Also:
Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A race condition leading to a NULL pointer dereference was found in the Linux kernel's Link Layer Control implementation. A local attacker with access to ping sockets could use this flaw to crash the system.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 14:22:09 EDT
Red Hat Product Errata RHSA-2017:2077 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 14:13:37 EDT
Red Hat Product Errata RHSA-2017:2669 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-09-06 20:36:52 EDT
Red Hat Product Errata RHSA-2018:1854 None None None 2018-06-19 00:49 EDT

  None (edit)
Description Martin Prpič 2017-03-28 07:39:48 EDT 
A race condition, leading to a NULL pointer dereference, was found in the Linux kernel's Link Layer Control implementation. A local attacker with access to ping sockets could use this flaw to corrupt kernel memory leading to a kernel crash or privilege escalation. 

References:

http://seclists.org/oss-sec/2017/q1/675

CVE assignment:

http://seclists.org/oss-sec/2017/q2/17

Patch:

http://seclists.org/oss-sec/2017/q1/677

https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=43a6684519ab0a6c52024b5e25322476cabad893

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=43a6684519ab0a6c52024b5e25322476cabad893
Comment 1 Adam Mariš 2017-03-28 08:06:34 EDT 
*** Bug 1436658 has been marked as a duplicate of this bug. ***
Comment 2 Adam Mariš 2017-03-28 08:09:25 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1436663]
Comment 3 Wade Mealing 2017-04-03 02:48:59 EDT 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 as the code with the flaw is not present in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2.  Future Linux kernel updates for the respective releases may address this issue.
Comment 8 Andrej Nemec 2017-04-05 04:02:03 EDT 
CVE assignment:

http://seclists.org/oss-sec/2017/q2/17
Comment 16 errata-xmlrpc 2017-08-01 15:14:50 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077
Comment 17 errata-xmlrpc 2017-08-02 03:55:03 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842
Comment 18 errata-xmlrpc 2017-09-06 16:41:04 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669
Comment 19 errata-xmlrpc 2018-06-19 00:48:52 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854
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