Vulnerability identifier: #VU17183

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-6444

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
NTPsec
Client/Desktop applications / Encryption software

Vendor: The NTPsec project

Description

The vulnerability allows a remote authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to attacker-controlled data is dereferenced by ntohl() in ntpd. A remote attacker can trigger stack-based buffer over-read in process_control() in ntp_control.c perform a denial of service attack.

Mitigation
Update to version 1.1.3.

Vulnerable software versions

NTPsec: 0.9.0 - 1.1.2

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External links
http://dumpco.re/blog/ntpsec-bugs
http://dumpco.re/bugs/ntpsec-oobread2
http://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
http://www.exploit-db.com/exploits/46176/

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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. However, proof of concept for this vulnerability is available.