Improper Verification of Cryptographic Signature Affecting simplesamlphp package, versions <1.15.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIAN12-SIMPLESAMLPHP-1559948
- published2 Feb 2018
- disclosed2 Feb 2018
Introduced: 2 Feb 2018
CVE-2017-18122 (opens in a new tab)How to fix?
Upgrade Debian:12 simplesamlphp to version 1.15.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream simplesamlphp package and not the simplesamlphp package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.