[arch-security] [ASA-201612-14] linux-zen: denial of service

[Santiago Torres-Arias]

Arch Linux Security Advisory ASA-201612-14
==========================================

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

Summary
=======

The package linux-zen before version 4.8.13-1 is vulnerable to denial
of service.

Resolution
==========

Upgrade to 4.8.13-1.

# pacman -Syu "linux-zen>=4.8.13-1"

The problem has been fixed upstream in version 4.8.13.

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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