Source Code Affecting ntp-perl package, versions <0:4.2.6p5-28.amzn2.2.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2-NTPPERL-1662689
- published27 Sept 2021
- disclosed13 Jan 2017
Introduced: 13 Jan 2017
CVE-2016-7429 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 ntp-perl to version 0:4.2.6p5-28.amzn2.2.1 or higher.
This issue was patched in ALAS2-2018-1009.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ntp-perl package and not the ntp-perl package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
NTP before 4.2.8p9 changes the peer structure to the interface it receives the response from a source, which allows remote attackers to cause a denial of service (prevent communication with a source) by sending a response for a source to an interface the source does not use.
References
- http://www.securityfocus.com/bid/94453
- https://www.kb.cert.org/vuls/id/633847
- http://nwtime.org/ntp428p9_release/
- https://bto.bluecoat.com/security-advisory/sa139
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
- http://support.ntp.org/bin/view/Main/NtpBug3072
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7429
- http://rhn.redhat.com/errata/RHSA-2017-0252.html
- http://www.securitytracker.com/id/1037354