CVE-2021-36222
Kerberos 5 ec_verify NULL Pointer Dereference
Description
ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.
INFO
Published Date :
July 22, 2021, 6:15 p.m.
Last Modified :
Nov. 28, 2021, 11:19 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-36222 has a 4 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-36222
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-36222.
| URL | Resource |
|---|---|
| https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562 | Patch Third Party Advisory |
| https://github.com/krb5/krb5/releases | Release Notes Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20211022-0003/ | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20211104-0007/ | Third Party Advisory |
| https://web.mit.edu/kerberos/advisories/ | Not Applicable |
| https://www.debian.org/security/2021/dsa-4944 | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |
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).
None
Java Shell
Random late night exercises
Dockerfile Shell Python HCL
a test code repository
Dockerfile HCL
KCC
Dockerfile Python HCL
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-36222 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-36222 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 -
Modified Analysis by [email protected]
Nov. 28, 2021
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20211022-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20211022-0003/ Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20211104-0007/ No Types Assigned https://security.netapp.com/advisory/ntap-20211104-0007/ Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpuoct2021.html No Types Assigned https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* *cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (including) 8.0.26 -
CVE Modified by [email protected]
Nov. 17, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211104-0007/ [No Types Assigned] -
CVE Modified by [email protected]
Nov. 10, 2021
Action Type Old Value New Value Removed Reference https://security.netapp.com/advisory/ntap-20211104-0007/ [No Types Assigned] -
CVE Modified by [email protected]
Nov. 04, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211104-0007/ [No Types Assigned] -
CVE Modified by [email protected]
Oct. 22, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211022-0003/ [No Types Assigned] -
CVE Modified by [email protected]
Oct. 20, 2021
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 02, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562 No Types Assigned https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562 Patch, Third Party Advisory Changed Reference Type https://github.com/krb5/krb5/releases No Types Assigned https://github.com/krb5/krb5/releases Release Notes, Third Party Advisory Changed Reference Type https://web.mit.edu/kerberos/advisories/ No Types Assigned https://web.mit.edu/kerberos/advisories/ Not Applicable Changed Reference Type https://www.debian.org/security/2021/dsa-4944 No Types Assigned https://www.debian.org/security/2021/dsa-4944 Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* versions up to (excluding) 1.18.4 *cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* versions from (including) 1.19.0 up to (excluding) 1.19.2 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jul. 25, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4944 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-36222 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-2021-36222
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.85 }} 0.23%
score
0.82517
percentile