CVE Vulnerability

CVE-2020-12676

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".

6.4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

9.1 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
http://seclists.org/fulldisclosure/2020/Oct/1 Exploit Mailing List
https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt Exploit Mailing List
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf Exploit Third Party Advisory
https://github.com/SAMLRaider/SAMLRaider Third Party Advisory
http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:fusionauth:samlv2:0.2.3:*:*:*:*:*:*:*
Information

Published : 2020-10-02 08:15

Updated : 2021-04-30 05:33

NVD link : CVE-2020-12676

Mitre link : CVE-2020-12676

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature