Debian Security Advisory DSA 3629-1 (ntp - security update)

Published: 2016-08-02 05:26:41
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:M/Au:N/C:N/I:N/A:C

severity_vector=CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

severity_origin=NVD

severity_date=2017-11-21 02:29:00 +0000 (Tue, 21 Nov 2017)

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
ntp on Debian Linux

Recommendations:
For the stable distribution (jessie), these problems have been fixed in version 1:4.2.6.p5+dfsg-7+deb8u2. For the testing distribution (stretch), these problems have been fixed in version 1:4.2.8p7+dfsg-1. For the unstable distribution (sid), these problems have been fixed in version 1:4.2.8p7+dfsg-1. We recommend that you upgrade your ntp Linux Distribution Packages.

Summary:
Several vulnerabilities were discovered in the Network Time Protocol daemon and utility programs: CVE-2015-7974 Matt Street discovered that insufficient key validation allows impersonation attacks between authenticated peers. CVE-2015-7977CVE-2015-7978Stephen Gray discovered that a NULL pointer dereference and a buffer overflow in the handling of ntpdc reslist commands may result in denial of service. CVE-2015-7979 Aanchal Malhotra discovered that if NTP is configured for broadcast mode, an attacker can send malformed authentication packets which break associations with the server for other broadcast clients. CVE-2015-8138 Matthew van Gundy and Jonathan Gardner discovered that missing validation of origin timestamps in ntpd clients may result in denial of service. CVE-2015-8158 Jonathan Gardner discovered that missing input sanitising in ntpq may result in denial of service. CVE-2016-1547 Stephen Gray and Matthew van Gundy discovered that incorrect handling of crypto NAK packets may result in denial of service. CVE-2016-1548 Jonathan Gardner and Miroslav Lichvar discovered that ntpd clients could be forced to change from basic client/server mode to interleaved symmetric mode, preventing time synchronisation. CVE-2016-1550 Matthew van Gundy, Stephen Gray and Loganaden Velvindron discovered that timing leaks in the packet authentication code could result in recovery of a message digest. CVE-2016-2516Yihan Lian discovered that duplicate IPs on unconfig directives will trigger an assert. CVE-2016-2518 Yihan Lian discovered that an OOB memory access could potentially crash ntpd.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-7974
https://nvd.nist.gov/vuln/detail/CVE-2015-7977
https://nvd.nist.gov/vuln/detail/CVE-2015-7978
https://nvd.nist.gov/vuln/detail/CVE-2015-7979
https://nvd.nist.gov/vuln/detail/CVE-2015-8138
https://nvd.nist.gov/vuln/detail/CVE-2015-8158
https://nvd.nist.gov/vuln/detail/CVE-2016-1547
https://nvd.nist.gov/vuln/detail/CVE-2016-1548
https://nvd.nist.gov/vuln/detail/CVE-2016-1550
https://nvd.nist.gov/vuln/detail/CVE-2016-2516
https://nvd.nist.gov/vuln/detail/CVE-2016-2518

References:

http://www.debian.org/security/2016/dsa-3629.html

Severity
High
CVSS Score
7.1
Published
2016-08-02
Modified
2021-11-24
Category
Debian Local Security Checks

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