SAML Assertion Signature Verification Issue in SimpleSAMLphp
CVE-2018-7644

7.5HIGH

Key Information:

Vendor

SimplesamlPHP

Status
SimplesamlPHP
Vendor
CVE Published:
5 March 2018

What is CVE-2018-7644?

The XmlSecLibs library used within the SAML2 library of SimpleSAMLphp prior to version 1.15.3 has a flaw in its signature verification process for SAML assertions. Due to this vulnerability, a remote attacker can craft a malicious SAML assertion that appears valid when verified, enabling them to impersonate legitimate users from an Identity Provider. This issue represents a key confusion problem that compromises the integrity of user authentication processes.

References

https://simplesamlphp.org/security/201802-01
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.