CVE-2021-22212
NTPsec NTP Key Generation Vulnerability - Uncontrolled Sequence of Characters
Description
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.
INFO
Published Date :
June 8, 2021, 1:15 p.m.
Last Modified :
Nov. 7, 2023, 3:30 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-22212.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1955859 | Issue Tracking Patch Third Party Advisory |
| https://gitlab.com/NTPsec/ntpsec/-/issues/699 | Issue Tracking Patch Third Party Advisory |
| https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json | Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-22212 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-22212 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference GitLab Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ [No types assigned] Removed Reference GitLab Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ -
Modified Analysis by [email protected]
Jun. 04, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 26, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/ [No Types Assigned] -
Initial Analysis by [email protected]
Jun. 21, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1955859 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1955859 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json No Types Assigned https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json Third Party Advisory Changed Reference Type https://gitlab.com/NTPsec/ntpsec/-/issues/699 No Types Assigned https://gitlab.com/NTPsec/ntpsec/-/issues/699 Issue Tracking, Patch, Third Party Advisory Added CWE NIST CWE-327 Added CPE Configuration OR *cpe:2.3:a:ntpsec:ntpsec:1.2.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-22212 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-22212
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} -0.00%
score
0.36889
percentile