CVE-2021-22212

https://notcve.org/view.php?id=CVE-2021-22212

ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with '#' characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the '#'. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them. ntpkeygen puede generar claves que ntpd no puede analizar. NTPsec versión 1.2.0 permite a ntpkeygen generar claves con caracteres "#". ntpd entonces rellena, acorta la clave, o comete un fallo al cargar estas claves por completo, dependiendo del tipo de clave y la colocación del "#". • https://bugzilla.redhat.com/show_bug.cgi?id=1955859 https://gitlab.com/NTPsec/ntpsec/-/issues/699 https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2 • CWE-327: Use of a Broken or Risky Cryptographic Algorithm •