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GLSA-201001-01 : NTP: Denial of Service

medium Nessus Plugin ID 44890

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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-201001-01 (NTP: Denial of Service)

 Robin Park and Dmitri Vinokurov discovered that ntp_request.c in ntpd does not handle MODE_PRIVATE packets correctly, causing a continuous exchange of MODE_PRIVATE error responses between two NTP daemons or causing high CPU load on a single host.
 Impact :

 A remote, unauthenticated attacker could send a specially crafted MODE_PRIVATE packet, allowing for a Denial of Service condition (CPU and bandwidth consumption).
 Workaround :

 There is no known workaround at this time.

Solution

All NTP users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/ntp-4.2.4_p7-r1'

See Also

https://security.gentoo.org/glsa/201001-01

Plugin Details

Severity: Medium

ID: 44890

File Name: gentoo_GLSA-201001-01.nasl

Version: 1.14

Type: local

Published: 2/25/2010

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

Vulnerability Information

CPE: cpe:/o:gentoo:linux, p-cpe:/a:gentoo:linux:ntp

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/3/2010

Reference Information

CVE: CVE-2009-3563

BID: 37255

GLSA: 201001-01