Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Simplesamlphp | Simplesamlphp | <= 1.14.16 |
| Debian | Debian Linux | 7.0 |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2018/02/msg00008.htmlMailing ListThird Party Advisory
- https://simplesamlphp.org/security/201710-01PatchVendor Advisory
- https://www.debian.org/security/2018/dsa-4127Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/02/msg00008.htmlMailing ListThird Party Advisory
- https://simplesamlphp.org/security/201710-01PatchVendor Advisory
- https://www.debian.org/security/2018/dsa-4127Third Party Advisory
FAQ
What is CVE-2017-18122?
CVE-2017-18122 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 tha...
How severe is CVE-2017-18122?
CVE-2017-18122 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-18122?
Check the references section above for vendor advisories and patch information. Affected products include: Simplesamlphp Simplesamlphp, Debian Debian Linux.