CVE Vulnerability

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

7.4 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json Third Party Advisory
https://gitlab.com/NTPsec/ntpsec/-/issues/699 Issue Tracking Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1955859 Issue Tracking Patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:ntpsec:ntpsec:1.2.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Information

Published : 2021-06-08 01:15

Updated : 2022-06-04 03:02

NVD link : CVE-2021-22212

Mitre link : CVE-2021-22212

Products Affected
No products.
CWE
CWE-327