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Amazon Linux AMI : ntp (ALAS-2015-593)
high Nessus Plugin ID 85751
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Synopsis
The remote Amazon Linux AMI host is missing a security update.Description
As discussed upstream, a flaw was found in the way ntpd processed certain remote configuration packets. Note that remote configuration is disabled by default in NTP. (CVE-2015-5146)It was found that the :config command can be used to set the pidfile and driftfile paths without any restrictions. A remote attacker could use this flaw to overwrite a file on the file system with a file containing the pid of the ntpd process (immediately) or the current estimated drift of the system clock (in hourly intervals).
(CVE-2015-7703)
It was found that ntpd could crash due to an uninitialized variable when processing malformed logconfig configuration commands.
(CVE-2015-5194)
It was found that ntpd exits with a segmentation fault when a statistics type that was not enabled during compilation (e.g.
timingstats) is referenced by the statistics or filegen configuration command. (CVE-2015-5195)
It was discovered that sntp would hang in an infinite loop when a crafted NTP packet was received, related to the conversion of the precision value in the packet to double. (CVE-2015-5219)
A flaw was found in the way the ntp-keygen utility generated MD5 symmetric keys on big-endian systems. An attacker could possibly use this flaw to guess generated MD5 keys, which could then be used to spoof an NTP client or server. (CVE-2015-3405)
Solution
Run 'yum update ntp' to update your system.See Also
Plugin Details
Severity: High
ID: 85751
File Name: ala_ALAS-2015-593.nasl
Version: 2.10
Type: local
Agent: unix
Published: 9/3/2015
Updated: 6/22/2020
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS v3
Risk Factor: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:ntp, p-cpe:/a:amazon:linux:ntp-debuginfo, p-cpe:/a:amazon:linux:ntp-doc, p-cpe:/a:amazon:linux:ntp-perl, p-cpe:/a:amazon:linux:ntpdate, cpe:/o:amazon:linux
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Patch Publication Date: 2/9/2016
Vulnerability Publication Date: 7/21/2017
Reference Information
CVE: CVE-2015-3405, CVE-2015-5146, CVE-2015-5194, CVE-2015-5195, CVE-2015-5219, CVE-2015-7703
ALAS: 2015-593