PT-2023-4983 · Ntpd · Ntpd

R.L. Nicholas · Published 2023-08-04 · Updated 2024-06-21 · CVE-2023-4012

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions ntpd versions (affected versions not specified)

Description The issue is related to the implementation of the Network Time Protocol (NTP) and specifically affects ntpd when it receives an NTS-enabled client request (mode 3) without being NTS-enabled itself (lacking a certificate). This can cause ntpd to crash. The vulnerability is associated with incomplete recognition of internal state, which can be exploited by a remote attacker to cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-372

Related Identifiers

BDU:2023-05522

CVE-2023-4012

DSA-5466-1

OPENSUSE-SU-2024:13463-1

Affected Products

Ntpd

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4012.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2023-4012 · Vendor Advisory
• https://gitlab.com/NTPsec/ntpsec/-/issues/794 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/OC2KDNL4GO7MDAFSNWBQA4T2Q2VNPUJD · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-4012 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-4012 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/VQDOZSTH2AZXBO2QAVR2SZEMK2A7WBRB · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-4012 · Security Note
• https://osv.dev/vulnerability/DSA-5466-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-4012 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-05522 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-4012 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-4012 · Vendor Advisory
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422 · Note
• https://blog.ntpsec.org/2023/08/03/version-1.2.2a.html · Note