CentOS Update for ntp CESA-2017:0252 centos7

Published: 2017-02-07 04:45:01
CVE Author: NIST National Vulnerability Database

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

Detection Type:
Linux Distribution Package

Summary:
Check the version of ntp

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
The Network Time Protocol (NTP) is used to synchronize a computer's time with another referenced time source. These Linux Distribution Packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service. Security Fix(es): * It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources. (CVE-2016-7426) * A flaw was found in the control mode functionality of ntpd. A remote attacker could send a crafted control mode packet which could lead to information disclosure or result in DDoS amplification attacks. (CVE-2016-9310) * A flaw was found in the way ntpd implemented the trap service. A remote attacker could send a specially crafted packet to cause a null pointer dereference that will crash ntpd, resulting in a denial of service. (CVE-2016-9311) * A flaw was found in the way ntpd running on a host with multiple network interfaces handled certain server responses. A remote attacker could use this flaw which would cause ntpd to not synchronize with the source. (CVE-2016-7429) * A flaw was found in the way ntpd calculated the root delay. A remote attacker could send a specially-crafted spoofed packet to cause denial of service or in some special cases even crash. (CVE-2016-7433)

Affected Versions:
ntp on CentOS 7

Recommendations:
Please Install the Updated Packages.

Solution Type:
Vendor Patch

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

https://nvd.nist.gov/vuln/detail/CVE-2016-7426
https://nvd.nist.gov/vuln/detail/CVE-2016-7429
https://nvd.nist.gov/vuln/detail/CVE-2016-7433
https://nvd.nist.gov/vuln/detail/CVE-2016-9310
https://nvd.nist.gov/vuln/detail/CVE-2016-9311

References:

http://lists.centos.org/pipermail/centos-announce/2017-February/022267.html

Severity
High
CVSS Score
7.1
Published
2017-02-07
Modified
2019-03-08
Category
CentOS Local Security Checks

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