[ASA-201810-2] ntp: arbitrary code execution

[Jelle van der Waa]

Arch Linux Security Advisory ASA-201810-2
=========================================

Severity: Medium
Date    : 2018-10-01
CVE-ID  : CVE-2018-12327
Package : ntp
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-723

Summary
=======

The package ntp before version 4.2.8.p12-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 4.2.8.p12-1.

# pacman -Syu "ntp>=4.2.8.p12-1"

The problem has been fixed upstream in version 4.2.8.p12.

Workaround
==========

None.

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

Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11
allows an attacker to achieve code execution or escalate to higher
privileges via a long string as the argument for an IPv4 or IPv6
command-line parameter.

Impact
======

A local attacker is able to execute arbitrary code via specially
crafted command line options.

References
==========

https://gist.github.com/fakhrizulkifli/9b58ed8e0354e8deee50b0eebd1c011f
http://bk.ntp.org/ntp-stable/?PAGE=patch&REV=5b3ba863G-42Ac2TFzCy-PZ8vqNfVA
https://security.archlinux.org/CVE-2018-12327
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