SimpleSAMLphp SAML2 spoof SAML responses
Date: 2022-05
Affected: composer/simplesamlphp/saml2, composer/simplesamlphp/saml2, composer/simplesamlphp/saml2
Attack vector: dos
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2016-9814
CVSS: 9.1 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)

The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library before 1.9.1, 1.10.x before 1.10.3, and 2.x before 2.3.3 allows remote attackers to spoof SAML responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.


Mitigations:

Architectural layers (MAESTRO):