Scientific Linux Security Update : ntp on SL6.x, SL7.x i386/x86_64

This script is Copyright (C) 2014-2015 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

Multiple buffer overflow flaws were discovered in ntpd's
crypto_recv(), ctl_putdata(), and configure() functions. A remote
attacker could use either of these flaws to send a specially crafted
request packet that could crash ntpd or, potentially, execute
arbitrary code with the privileges of the ntp user. Note: the
crypto_recv() flaw requires non- default configurations to be active,
while the ctl_putdata() flaw, by default, can only be exploited via
local attackers, and the configure() flaw requires additional
authentication to exploit. (CVE-2014-9295)

It was found that ntpd automatically generated weak keys for its
internal use if no ntpdc request authentication key was specified in
the ntp.conf configuration file. A remote attacker able to match the
configured IP restrictions could guess the generated key, and possibly
use it to send ntpdc query or configuration requests. (CVE-2014-9293)

It was found that ntp-keygen used a weak method for generating MD5
keys. This could possibly allow an attacker to guess generated MD5
keys that could then be used to spoof an NTP client or server. Note:
it is recommended to regenerate any MD5 keys that had explicitly been
generated with ntp-keygen; the default installation does not contain
such keys). (CVE-2014-9294)

A missing return statement in the receive() function could potentially
allow a remote attacker to bypass NTP's authentication mechanism.
(CVE-2014-9296)

After installing the update, the ntpd daemon will restart
automatically.

See also :

http://www.nessus.org/u?1eb916f4

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 80164 ()

Bugtraq ID:

CVE ID: CVE-2014-9293
CVE-2014-9294
CVE-2014-9295
CVE-2014-9296

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