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Bug 1403260 - (CVE-2016-9919) CVE-2016-9919 kernel: Linux panic on fragemented IPv6 traffic (icmp6_send)
CVE-2016-9919 kernel: Linux panic on fragemented IPv6 traffic (icmp6_send)
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20161208,repo...
: Security
Depends On: 1403261
Blocks: 1403262
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Reported: 2016-12-09 09:26 EST by Andrej Nemec
Modified: 2016-12-13 13:38 EST (History)
36 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
The icmp6_send function in net/ipv6/icmp.c in the Linux kernel through 4.8.12 omits a certain check of the dst data structure which allows remote attackers to cause a denial of service (panic) via a fragmented IPv6 packet.
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Last Closed: 2016-12-13 03:51:18 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Andrej Nemec 2016-12-09 09:26:29 EST 
The linux kernel contains a bug where a fragmented IPv6 packet causes a panic after a timeout (seems to be roughly 60 seconds). This can be triggered remotely via the internet and results in a DoS (kernel panic). The icmp6_send function in net/ipv6/icmp.c in the Linux kernel through 4.8.12 omits a certain check of the dst data structure, which allows remote attackers to cause a denial of service (panic) via a fragmented IPv6 packet.

Upstream bug:

https://bugzilla.kernel.org/show_bug.cgi?id=189851

Upstream patches:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79dc7e3f1c

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5d41ce29e3

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1d2f7b2d95

CVE assignment:

http://seclists.org/oss-sec/2016/q4/641
Comment 1 Andrej Nemec 2016-12-09 09:27:18 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1403261]
Comment 4 Vladis Dronov 2016-12-13 03:51:18 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 the code with the flaw is not present in the products listed.
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