CVE-2026-121506 | BDVDB-2026-399998 Detail
NTPsecNTPsec
Description#
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 crash ntpd, and, combined with the NTS-KE client out-of-bounds read fixed in 1.2.4, to bypass NTS authentication and set the client's time, via an NTS Authenticator and Encrypted Extension Fields field whose nonce length exceeds the field.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact high. Attack vector: network.
Weaknesses#
- CWE-787 Out-of-bounds Write
References#
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.