How the Mentioned CVE Works:
CVE-2025-25292 is a critical vulnerability in the `ruby-saml` library, which is a dependency of omniauth-saml. This vulnerability stems from a Signature Wrapping Attack (SWA) flaw in the SAML authentication process. SAML (Security Assertion Markup Language) is widely used for single sign-on (SSO) implementations. In this attack, an attacker can manipulate the SAML response by injecting a malicious assertion while preserving the original signature. The server, due to improper validation, processes the malicious assertion, allowing the attacker to impersonate a legitimate user. This bypasses authentication and grants unauthorized access to sensitive systems or data. The vulnerability affects `ruby-saml` versions < 1.10.6, >= 2.0.0, < 2.1.3, and >= 2.2.0, < 2.2.3.
DailyCVE Form:
Platform: Omniauth-saml
Version: < 1.10.6, 2.0.0-2.1.2, 2.2.0-2.2.2
Vulnerability: Signature Wrapping Attack
Severity: Critical
Date: Mar 12, 2025
What Undercode Say:
Exploitation:
1. Exploit Code:
An attacker crafts a malicious SAML response with a wrapped signature. The payload includes a forged assertion while retaining the original signature to bypass validation.
<saml:Assertion xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="malicious_assertion"> <!-- Malicious user data --> </saml:Assertion>
2. Exploit Command:
Use tools like `Burp Suite` or `Python SAML libraries` to manipulate SAML responses.
python3 saml_exploit.py --target <SAML_ENDPOINT> --payload malicious_saml.xml
Protection:
1. Upgrade:
Update `ruby-saml` to the patched versions: 1.10.6, 2.1.3, or 2.2.3.
bundle update ruby-saml
2. Validation:
Implement strict XML signature validation to detect wrapped assertions.
settings = OneLogin::RubySaml::Settings.new settings.security[bash] = true
3. Monitoring:
Monitor SAML endpoints for unusual activity or repeated authentication attempts.
grep "SAML" /var/log/auth.log
4. Code Fix:
Ensure the SAML response is validated against the X.509 certificate.
response = OneLogin::RubySaml::Response.new(saml_response) response.settings = settings response.is_valid?
5. Tools:
Use security tools like `SAML-tracer` or `SAML Raider` to test for vulnerabilities.
saml-tracer --analyze <SAML_RESPONSE>
6. Logging:
Enable detailed logging for SAML transactions to detect anomalies.
OneLogin::RubySaml::Logging.logger = Logger.new(STDOUT)
7. Network Security:
Restrict access to SAML endpoints using firewalls or IP whitelisting.
iptables -A INPUT -p tcp --dport 443 -s trusted_ip -j ACCEPT
8. Education:
Train developers on secure SAML implementation and common vulnerabilities like SWA.
By following these steps, organizations can mitigate the risks associated with CVE-2025-25292 and protect their SAML-based authentication systems.
References:
Reported By: https://github.com/advisories/GHSA-hw46-3hmr-x9xv
Extra Source Hub:
Undercode
