7.5
HIGH
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. 21, 2024, 6:13 a.m.

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.

ID Vendor Product Action
1 Netapp active_iq_unified_manager
2 Netapp oncommand_insight
3 Netapp oncommand_workflow_automation
4 Netapp snapcenter
1 Debian debian_linux
1 Mit kerberos_5
1 Oracle mysql_server
References to Advisories, Solutions, and Tools

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

Updated: 2 years, 9 months ago
0 stars 0 fork 0 watcher
Born at : March 8, 2022, 11:16 a.m. This repo has been linked 25 different CVEs too.

Random late night exercises

Dockerfile Shell Python HCL

Updated: 3 years ago
0 stars 0 fork 0 watcher
Born at : Nov. 17, 2021, 11:43 a.m. This repo has been linked 23 different CVEs too.

a test code repository

Dockerfile HCL

Updated: 1 year, 9 months ago
1 stars 0 fork 0 watcher
Born at : Sept. 29, 2021, 6:37 p.m. This repo has been linked 13 different CVEs too.

KCC

Dockerfile Python HCL

Updated: 3 years, 3 months ago
0 stars 0 fork 0 watcher
Born at : Sept. 8, 2021, 6:46 a.m. This repo has been linked 3 different CVEs too.

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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
    Added Reference https://github.com/krb5/krb5/releases
    Added Reference https://security.netapp.com/advisory/ntap-20211022-0003/
    Added Reference https://security.netapp.com/advisory/ntap-20211104-0007/
    Added Reference https://web.mit.edu/kerberos/advisories/
    Added Reference https://www.debian.org/security/2021/dsa-4944
    Added Reference https://www.oracle.com/security-alerts/cpuoct2021.html
  • 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]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
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.

1.74 }} 0.54%

score

0.87565

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability