Resource exhaustion in ntp - CVE-2016-7427
Published: January 13, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU39822
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2016-7427
CWE-ID: CWE-400
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: ntp.org
Affected software:
ntp
ntp
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.
How to mitigate CVE-2016-7427
Install update from vendor's website.
Sources
- http://nwtime.org/ntp428p9_release/
- http://support.ntp.org/bin/view/Main/NtpBug3114
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
- http://www.securityfocus.com/bid/94447
- http://www.securitytracker.com/id/1037354
- 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://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
- https://usn.ubuntu.com/3707-2/
- https://www.kb.cert.org/vuls/id/633847