CVE-2021-3827
Keycloak Authentication Bypass
Description
A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed. By exploiting this behavior, an attacker can bypass the MFA authentication by sending a SOAP request with an AuthnRequest and Authorization header with the user's credentials. The highest threat from this vulnerability is to confidentiality and integrity.
INFO
Published Date :
Aug. 23, 2022, 4:15 p.m.
Last Modified :
Nov. 30, 2022, 6:46 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
1.6
Public PoC/Exploit Available at Github
CVE-2021-3827 has a 1 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-2021-3827
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-2021-3827.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2021-3827 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2007512 | Issue Tracking Vendor Advisory |
| https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d | Patch Third Party Advisory |
| https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v | 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
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3827 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3827 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 -
Reanalysis by [email protected]
Nov. 30, 2022
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CVSS V3.1 NIST AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N -
Initial Analysis by [email protected]
Aug. 27, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Changed Reference Type https://access.redhat.com/security/cve/CVE-2021-3827 No Types Assigned https://access.redhat.com/security/cve/CVE-2021-3827 Vendor Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2007512 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2007512 Issue Tracking, Vendor Advisory Changed Reference Type https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d No Types Assigned https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d Patch, Third Party Advisory Changed Reference Type https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v No Types Assigned https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v Third Party Advisory Added CWE NIST CWE-287 Added CPE Configuration OR *cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* versions up to (excluding) 18.0.0 *cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:single_sign-on:7.5.0:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:openshift_container_platform:4.8:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.9:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3827 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-2021-3827
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.16 }} 0.04%
score
0.50958
percentile