En resumen
- CVE-2017-18122 es una vulnerabilidad ALTO (CVSS 8.1) que afecta a simplesamlphp/simplesamlphp, simplesamlphp (simplesamlphp).
- Probabilidad de explotación en los próximos 30 días (EPSS): 1.1%, mayor que el 65.4% de las vulnerabilidades.
- Solución: actualizar a 1.14.17 o posterior.
Description
A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.
NVD description
A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.
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