NULL Pointer Dereference Affecting ntp-perl package, versions <0:4.2.6p5-43.33.amzn1
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-AMZN201803-NTPPERL-1704103
- published27 Sept 2021
- disclosed13 Jan 2017
Introduced: 13 Jan 2017
CVE-2016-9311 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 ntp-perl to version 0:4.2.6p5-43.33.amzn1 or higher.
This issue was patched in ALAS-2017-781.
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:2018.03 relevant fixed versions and status.
ntpd in NTP before 4.2.8p9, when the trap service is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted packet.
References
- http://www.securityfocus.com/bid/94444
- 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
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03799en_us
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03885en_us
- http://support.ntp.org/bin/view/Main/NtpBug3119
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9311
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
- http://rhn.redhat.com/errata/RHSA-2017-0252.html
- http://www.securitytracker.com/id/1037354
- https://usn.ubuntu.com/3707-2/