GLSA-200905-08 : NTP: Remote execution of arbitrary code

This script is Copyright (C) 2009-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200905-08
(NTP: Remote execution of arbitrary code)

Multiple vulnerabilities have been found in the programs included in
the NTP package:
Apple Product Security reported a
boundary error in the cookedprint() function in ntpq/ntpq.c, possibly
leading to a stack-based buffer overflow (CVE-2009-0159).
Chris Ries of CMU reported a boundary error within the
crypto_recv() function in ntpd/ntp_crypto.c, possibly leading to a
stack-based buffer overflow (CVE-2009-1252).

Impact :

A remote attacker might send a specially crafted package to a machine
running ntpd, possibly resulting in the remote execution of arbitrary
code with the privileges of the user running the daemon, or a Denial of
Service. NOTE: Successful exploitation requires the 'autokey' feature
to be enabled. This feature is only available if NTP was built with the
'ssl' USE flag.
Furthermore, a remote attacker could entice a user into connecting to a
malicious server using ntpq, possibly resulting in the remote execution
of arbitrary code with the privileges of the user running the
application, or a Denial of Service.

Workaround :

You can protect against CVE-2009-1252 by disabling the 'ssl' USE flag
and recompiling NTP.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200905-08.xml

Solution :

All NTP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-misc/ntp-4.2.4_p7'

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 5.9
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Gentoo Local Security Checks

Nessus Plugin ID: 38920 (gentoo_GLSA-200905-08.nasl)

Bugtraq ID: 34481
35017

CVE ID: CVE-2009-0159
CVE-2009-1252