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Bug 1338625 - (CVE-2016-4951) CVE-2016-4951 kernel: Null pointer dereference in tipc_nl_publ_dump
CVE-2016-4951 kernel: Null pointer dereference in tipc_nl_publ_dump
Status: CLOSED NOTABUG
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=20160516,repor...
: Security
Depends On: 1338626 1346815
Blocks: 1338627
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Reported: 2016-05-23 03:20 EDT by Andrej Nemec
Modified: 2016-09-26 02:50 EDT (History)
35 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A vulnerability was found in the Linux kernel. The pointer to the netlink socket attribute is not checked, which could cause a null pointer dereference when parsing the nested attributes in function tipc_nl_publ_dump(). This allows local users to cause a DoS.
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Clone Of:
Environment:
Last Closed: 2016-06-15 07:38:52 EDT
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Regression: ---
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Documentation: ---
CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Andrej Nemec 2016-05-23 03:20:11 EDT 
A vulnerability was found in the Linux kernel. The pointer to the netlink socket attribute is not checked, which could cause a null pointer dereference when parsing the nested attributes in function tipc_nl_publ_dump. This allows local users to cause a DoS.

References:

http://lists.openwall.net/netdev/2016/05/14/28

http://lists.openwall.net/netdev/2016/05/16/26

CVE-ID request and assignment:

http://seclists.org/oss-sec/2016/q2/385

http://seclists.org/oss-sec/2016/q2/386

Introduced by:

https://github.com/torvalds/linux/commit/1a1a143daf84db95dd7212086042004a3abb7bc2

Upstream fix:

https://github.com/torvalds/linux/commit/45e093ae2830cd1264677d47ff9a95a71f5d9f9c
Comment 1 Andrej Nemec 2016-05-23 03:21:37 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1338626]
Comment 2 Fedora Update System 2016-06-01 16:23:48 EDT 
kernel-4.4.11-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 3 Fedora Update System 2016-06-08 18:53:26 EDT 
kernel-4.5.6-200.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 6 Vladis Dronov 2016-06-15 07:38:52 EDT 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2, as there is no code which introduced the flaw in the products listed.
Comment 8 Fedora Update System 2016-06-18 14:49:42 EDT 
kernel-4.5.6-300.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
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