Priority LOW 33
An out-of-bounds read and write in NTS client extension field parsing (extens_client_recv) in NTPsec before 1.2.5 allows a remote attacker who can send NTP server-mode replies to an NTS client to corrupt heap memory and…
CVSS 3.1HIGH 7.4· Network · No auth · No interaction · EPSS 0.00449 · Published 2026-11-03 · Fixed in 1.2.5 CWE-787
Priority LOW 17
An out-of-bounds read in the NTS-KE client response parser (nts_client_process_response_core) in NTPsec before 1.2.4 allows a malicious NTS-KE server to read the client's stack memory, including pointers that defeat ASLR…
CVSS 3.1LOW 3.7· Network · No auth · No interaction · EPSS 0.00293 · Published 2026-11-03 · Fixed in 1.2.4 CWE-125
Priority MEDIUM 40
Out-of-bounds read in NTS extension field parsing in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to crash the daemon via an NTS Authenticator and Encrypted Extension Fields (AEEF) field with an oversized non…
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00548 · Published 2026-10-21 · Fixed in 1.2.6 CWE-125
Priority LOW 23
Out-of-bounds read in the Motorola Oncore refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the GPS receiver's serial data to crash ntpd or disclose memory via a PPS Control (@@Gc) reply with an…
CVSS 3.1MEDIUM 5.2· Physical · No auth · No interaction · EPSS 0.00181 · Published 2026-10-21 · Fixed in 1.2.6 CWE-125
Priority LOW 28
Heap-based buffer overflow in the JJY refclock driver in NTPsec ntpd before 1.2.6 allows an attacker who controls the Telephone JJY time source to corrupt memory or crash ntpd via more than six time replies.
CVSS 3.1MEDIUM 6.4· Physical · No auth · No interaction · EPSS 0.00205 · Published 2026-10-21 · Fixed in 1.2.6 CWE-122
Priority LOW 39
Reachable exit in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to terminate the daemon via an NTS request with excess NTS Cookie Placeholder extension fields.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00428 · Published 2026-10-21 · Fixed in 1.2.6 CWE-617
Priority LOW 20
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
CVSS 3.1MEDIUM 4.7· Local · Low privileges · No interaction · EPSS 0.00111 · Published 2026-07-31 · Fixed in 1.2.5 CWE-120
Priority MEDIUM 44
gpsd through release-3.27.5, fixed at commit 4c06658, contains a command injection vulnerability in gpsprof that allows attackers who control the GPS device subtype value to execute arbitrary shell commands by embedding…
CVSS 4.0HIGH 8.4· Local · No auth · User interaction · EPSS 0.02862 · Published 2026-07-09 · Fixed CWE-78
Priority LOW 39
ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.0045 · Published 2023-08-07 · No fix listed CWE-372
Priority LOW 33
ntpkeygen can generate keys that ntpd fails to parse.
CVSS 3.1HIGH 7.4· Network · No auth · No interaction · EPSS 0.00522 · Published 2021-06-08 · No fix listed CWE-327
Priority MEDIUM 44
An issue was discovered in NTPsec before 1.1.3.
CVSS 3.0MEDIUM 6.5· Network · Low privileges · No interaction · EPSS 0.14689 · Published 2019-01-16 · No fix listed CWE-476
Priority HIGH 69
An issue was discovered in NTPsec before 1.1.3.
CVSS 3.0CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.45719 · Published 2019-01-16 · No fix listed CWE-125
Priority HIGH 76
An issue was discovered in NTPsec before 1.1.3.
CVSS 3.0CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.66881 · Published 2019-01-16 · No fix listed CWE-125
Priority MEDIUM 44
An issue was discovered in NTPsec before 1.1.3.
CVSS 3.0MEDIUM 6.5· Network · Low privileges · No interaction · EPSS 0.1371 · Published 2019-01-16 · No fix listed CWE-787
Priority LOW 22
ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks.
CVSS 3.0LOW 3.7· Network · No auth · No interaction · EPSS 0.02233 · Published 2017-01-27 · No fix listed CWE-254