[arch-security] [ASA-201612-10] linux: denial of service

[Remi Gacogne]

Arch Linux Security Advisory ASA-201612-10
==========================================

Severity: High
Date    : 2016-12-10
CVE-ID  : CVE-2016-9919
Package : linux
Type    : denial of service
Remote  : Yes
Link    : https://wiki.archlinux.org/index.php/CVE

Summary
=======

The package linux before version 4.8.12-3 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 4.8.12-3.

# pacman -Syu "linux>=4.8.12-3"

The problem has been fixed upstream but no release is available yet.

Workaround
==========

None.

Description
===========

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.

Impact
======

A remote attacker can cause a kernel panic by sending a fragmented IPv6
packet.

References
==========

https://bugzilla.kernel.org/show_bug.cgi?id=189851
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79dc7e3f1cd323be4c81aa1a94faa1b3ed987fb2
https://access.redhat.com/security/cve/CVE-2016-9919

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