Denial of service in NTPsec

1) Use of uninitialized resource

EUVDB-ID: #VU78975

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-4012

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

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

The vulnerability exists due to usage of uninitialized resources in ntpd/nts_cookie.c when processing NTS requests in a server with disabled NTS support. A remote attacker can send an NTS-enabled client request (mode 3) to the server and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NTPsec: 1.0.0 - 1.2.2

CPE2.3

• cpe:2.3:a:the_ntpsec_project:ntpsec:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:the_ntpsec_project:ntpsec:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:the_ntpsec_project:ntpsec:1.1.1:*:*:*:*:*:*:*

External links

https://gitlab.com/NTPsec/ntpsec/-/issues/794

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.