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".

CVSS v3.0 9.1 CRITICAL
CVSS v2.0 6.4 MEDIUM

9.1^/10

CVSS v3.0 : CRITICAL

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

6.4^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:N

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
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://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 VDB Entry

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Configurations

Configuration 1 (hide)

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

Information

Published : 2020-10-02 13:15

Updated : 2021-04-30 10:33

NVD link : CVE-2020-12676

Mitre link : CVE-2020-12676

JSON object : View

CWE

CWE-347

Improper Verification of Cryptographic Signature

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Products Affected

fusionauth

samlv2

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