Improper Input Validation Affecting ntp package, versions <1:4.2.8p7+dfsg-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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Start learning- Snyk IDSNYK-DEBIAN9-NTP-372965
- published30 Jan 2017
- disclosed30 Jan 2017
Introduced: 30 Jan 2017
CVE-2016-2517 (opens in a new tab)How to fix?
Upgrade Debian:9 ntp to version 1:4.2.8p7+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ntp package and not the ntp package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
References
- https://www.kb.cert.org/vuls/id/718152
- https://security-tracker.debian.org/tracker/CVE-2016-2517
- https://security.gentoo.org/glsa/201607-15
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
- http://support.ntp.org/bin/view/Main/NtpBug3010
- https://security.netapp.com/advisory/ntap-20171004-0002/
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.securityfocus.com/bid/88189
- http://www.securitytracker.com/id/1035705