Vulnerability identifier: #VU17184

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-2019-6445

CWE-ID: CWE-476

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 a NULL pointer dereference error. A remote authenticated attacker can trigger NULL pointer dereference and ntpd crash in ntp_control.c, related to ctl_getitem. A remote attacker can perform a denial of service (DoS) 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-authed-npe
http://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS
http://www.exploit-db.com/exploits/46177/

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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.