Vulnerability Details : 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.
Products affected by CVE-2021-22212
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:a:ntpsec:ntpsec:1.2.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-22212
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-22212
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
|
4.0
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N |
0.3
|
3.6
|
GitLab Inc. | |
|
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2021-22212
-
The product uses a broken or risky cryptographic algorithm or protocol.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-22212
-
https://bugzilla.redhat.com/show_bug.cgi?id=1955859
1955859 – ntpd compiled without refclock supportIssue Tracking;Patch;Third Party Advisory
-
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json
2021/CVE-2021-22212.json · master · GitLab.org / cves · GitLabThird Party Advisory
-
https://gitlab.com/NTPsec/ntpsec/-/issues/699
Not FoundIssue Tracking;Patch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/
[SECURITY] Fedora 34 Update: ntpsec-1.2.1-3.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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