Debian DSA-3108-1 : ntp - security update

High Nessus Plugin ID 80208

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities were discovered in the ntp package, an implementation of the Network Time Protocol.

- CVE-2014-9293 ntpd generated a weak key for its internal use, with full administrative privileges. Attackers could use this key to reconfigure ntpd (or to exploit other vulnerabilities).

- CVE-2014-9294 The ntp-keygen utility generated weak MD5 keys with insufficient entropy.

- CVE-2014-9295 ntpd had several buffer overflows (both on the stack and in the data section), allowing remote authenticated attackers to crash ntpd or potentially execute arbitrary code.

- CVE-2014-9296 The general packet processing function in ntpd did not handle an error case correctly.

The default ntpd configuration in Debian restricts access to localhost (and possible the adjacent network in case of IPv6).

Keys explicitly generated by 'ntp-keygen -M' should be regenerated.

Solution

Upgrade the ntp packages.

For the stable distribution (wheezy), these problems have been fixed in version 1:4.2.6.p5+dfsg-2+deb7u1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=773576

https://security-tracker.debian.org/tracker/CVE-2014-9293

https://security-tracker.debian.org/tracker/CVE-2014-9294

https://security-tracker.debian.org/tracker/CVE-2014-9295

https://security-tracker.debian.org/tracker/CVE-2014-9296

https://packages.debian.org/source/wheezy/ntp

https://www.debian.org/security/2014/dsa-3108

Plugin Details

Severity: High

ID: 80208

File Name: debian_DSA-3108.nasl

Version: 1.16

Type: local

Agent: unix

Published: 2014/12/23

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:ntp, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/12/20

Reference Information

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

BID: 71757, 71761, 71762

DSA: 3108