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Bug 1406358 - (CVE-2016-7917) CVE-2016-7917 kernel: netfilter: nfnetlink: correctly validate length of batch messages
CVE-2016-7917 kernel: netfilter: nfnetlink: correctly validate length of batc...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160202,reported=2...
: Security
Depends On:
Blocks: 1395269
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Reported: 2016-12-20 06:33 EST by Vladis Dronov
Modified: 2016-12-20 11:20 EST (History)
34 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The nfnetlink_rcv_batch() function in 'net/netfilter/nfnetlink.c' in the Linux kernel before 4.5 does not check whether a batch message's length field is large enough, which allows local users to obtain sensitive information from kernel memory or cause a denial of service (infinite loop or out-of-bounds read) by leveraging the CAP_NET_ADMIN capability.
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Clone Of:
Environment:
Last Closed: 2016-12-20 06:36:44 EST
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Vladis Dronov 2016-12-20 06:33:42 EST 
The nfnetlink_rcv_batch() function in 'net/netfilter/nfnetlink.c' in the Linux kernel before 4.5 does not check whether a batch message's length field is large enough, which allows local users to obtain sensitive information from kernel memory or cause a denial of service (infinite loop or out-of-bounds read) by leveraging the CAP_NET_ADMIN capability.

References:

https://source.android.com/security/bulletin/2016-11-01.html#id-in-kernel-components-1

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-7917

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c58d6c93680f28ac58984af61d0a7ebf4319c241
Comment 3 Vladis Dronov 2016-12-20 06:36:44 EST 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG-2 as code with the flaw is not present in the products listed.
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