Vulnerability identifier: #VU12303

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-7426

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ntp
Server applications / Other server solutions

Vendor: ntp.org

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

The weakness exists due to rate limits responses received from the configured sources when rate limiting for all associations is enabled. A remote attacker can send responses with a spoofed source address and cause the service to crash.

Mitigation
Update to version 4.2.8p9.

Vulnerable software versions

ntp: 4.2.8p1 - 4.2.8p8

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External links
http://www.nwtime.org/ntp428p9_release/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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