CVE-2020-12676
FusionAuth SAML Signature Exclusion Attack
Description
FusionAuth fusionauth-samlv2 0.2.3 allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack".
INFO
Published Date :
Oct. 2, 2020, 8:15 p.m.
Last Modified :
April 30, 2021, 5:33 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-12676 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2020-12676.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html | Exploit Third Party Advisory VDB Entry |
| http://seclists.org/fulldisclosure/2020/Oct/1 | Exploit Mailing List Third Party Advisory |
| https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt | Exploit Mailing List Vendor Advisory |
| https://github.com/SAMLRaider/SAMLRaider | Third Party Advisory |
| https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf | Exploit 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).
SAML2 Burp Extension
saml burp
Java Shell HTML Python
SAML v2.0 bindings in Java using JAXB
Java
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-12676 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-12676 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]
Apr. 30, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:compass-security:fusionauth-samlv2:0.2.3:*:*:*:*:*:*:* OR *cpe:2.3:a:fusionauth:samlv2:0.2.3:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Oct. 08, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Changed Reference Type http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html No Types Assigned http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html Exploit, Third Party Advisory, VDB Entry Changed Reference Type http://seclists.org/fulldisclosure/2020/Oct/1 No Types Assigned http://seclists.org/fulldisclosure/2020/Oct/1 Exploit, Mailing List, Third Party Advisory Changed Reference Type https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt No Types Assigned https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt Exploit, Mailing List, Vendor Advisory Changed Reference Type https://github.com/SAMLRaider/SAMLRaider No Types Assigned https://github.com/SAMLRaider/SAMLRaider Third Party Advisory Changed Reference Type https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf No Types Assigned https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf Exploit, Third Party Advisory Added CWE NIST CWE-347 Added CPE Configuration OR *cpe:2.3:a:compass-security:fusionauth-samlv2:0.2.3:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 02, 2020
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html [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-2020-12676 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-2020-12676
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.51 }} 0.07%
score
0.76623
percentile