#VU12125 Configuration error in ntp - CVE-2017-6463

Vulnerability identifier: #VU12125

Vulnerability risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green]

CVE-ID: CVE-2017-6463

CWE-ID: CWE-16

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ntp
Server applications / Other server solutions

Vendor: ntp.org

Description
The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The weakness exists in the unpeer option due to the NTP server's parsing of configuration directives. A remote attacker can submit a specially crafted message and cause the service to crash.

Mitigation
Update to versions 4.2.8p10 or 4.3.94.

Vulnerable software versions

ntp: 4.2.8 - 4.3.93

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External links
https://support.ntp.org/bin/view/Main/NtpBug3387

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.