CVE-2021-22212 (GCVE-0-2021-22212)

Vulnerability from cvelistv5 – Published: 2021-06-08 12:07 – Updated: 2024-08-03 18:37
VLAI?
Summary
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.
Severity ?
4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N
CWE
  • Improper filtering of special elements in ntpsec
Assigner
References
Impacted products
Vendor Product Version
NTPsec ntpsec Affected: =1.2.0
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Credits
Maciej Zenczykowski
Show details on NVD website
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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