Bug 1403260 (CVE-2016-9919) - CVE-2016-9919 kernel: Linux panic on fragemented IPv6 traffic (icmp6_send)
Summary: CVE-2016-9919 kernel: Linux panic on fragemented IPv6 traffic (icmp6_send)
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-9919
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1403261
Blocks: 1403262
TreeView+ depends on / blocked
 
Reported: 2016-12-09 14:26 UTC by Andrej Nemec
Modified: 2021-02-17 02:54 UTC (History)
36 users (show)

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.
Clone Of:
Environment:
Last Closed: 2016-12-13 08:51:18 UTC

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Description Andrej Nemec 2016-12-09 14:26:29 UTC 
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 14:27:18 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1403261]
Comment 4 Vladis Dronov 2016-12-13 08:51:18 UTC 
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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