Debian Security Bug TrackerDEBIANCVE:CVE-2021-22212CVE-2021-22212
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
38.7%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | ntpsec | < 1.2.0+dfsg1-4 | ntpsec_1.2.0+dfsg1-4_all.deb |
| Debian | 11 | all | ntpsec | < 1.2.0+dfsg1-4 | ntpsec_1.2.0+dfsg1-4_all.deb |
| Debian | 999 | all | ntpsec | < 1.2.0+dfsg1-4 | ntpsec_1.2.0+dfsg1-4_all.deb |
| Debian | 13 | all | ntpsec | < 1.2.0+dfsg1-4 | ntpsec_1.2.0+dfsg1-4_all.deb |
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
38.7%