CVE-2020-12676

Public Exploit

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".

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.53%
Vendor Advisory compass-security.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.nds.ruhr-uni-bochum.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf third party advisory exploit
https://github.com/SAMLRaider/SAMLRaider third party advisory
http://seclists.org/fulldisclosure/2020/Oct/1 mailing list third party advisory exploit
https://compass-security.com/fileadmin/Research/Advisories/2020-06_CSNC-2020-002_FusionAuth_Signature_Exclusion_Attack.txt vendor advisory mailing list exploit
http://packetstormsecurity.com/files/159454/FusionAuth-SAMLv2-0.2.3-Message-Forging.html third party advisory vdb entry exploit

Frequently Asked Questions

What is the severity of CVE-2020-12676?
CVE-2020-12676 has been scored as a critical severity vulnerability.
How to fix CVE-2020-12676?
To fix CVE-2020-12676, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-12676 being actively exploited in the wild?
It is possible that CVE-2020-12676 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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