Improper Verification of Cryptographic Signature Affecting simplesamlphp package, versions <1.13.1-2+deb8u1
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.
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Test your applications- Snyk IDSNYK-DEBIAN8-SIMPLESAMLPHP-306110
- published5 Mar 2018
- disclosed5 Mar 2018
Introduced: 5 Mar 2018
CVE-2018-7644 (opens in a new tab)How to fix?
Upgrade Debian:8 simplesamlphp to version 1.13.1-2+deb8u1 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:8 relevant fixed versions and status.
The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.