CVE-2020-5390 : What You Need to Know
Learn about CVE-2020-5390 affecting PySAML2 before 5.0.0, allowing attackers to manipulate signed data. Find mitigation steps and update recommendations here.
PySAML2 before 5.0.0 is vulnerable to XML Signature Wrapping (XSW) due to inadequate signature verification, potentially leading to the use of incorrect data.
Understanding CVE-2020-5390
What is CVE-2020-5390?
PySAML2 before version 5.0.0 lacks proper validation of signatures in SAML documents, making it susceptible to XML Signature Wrapping attacks.
The Impact of CVE-2020-5390
This vulnerability allows malicious actors to manipulate signed data, leading to unauthorized access or data tampering.
Technical Details of CVE-2020-5390
Vulnerability Description
PySAML2 before 5.0.0 fails to verify the location of signatures in SAML documents, enabling attackers to perform XML Signature Wrapping attacks.
Affected Systems and Versions
- Product: PySAML2
- Vendor: N/A
- Versions affected: <5.0.0
Exploitation Mechanism
- Attackers can craft malicious SAML documents with manipulated signatures to deceive PySAML2 into accepting incorrect data.
Mitigation and Prevention
Immediate Steps to Take
- Update PySAML2 to version 5.0.0 or later to mitigate the XSW vulnerability.
- Monitor for any suspicious activities related to SAML assertions.
Long-Term Security Practices
- Implement strict signature validation mechanisms in SAML processing.
- Regularly review and update security protocols to address emerging threats.
Patching and Updates
- Stay informed about security advisories and promptly apply patches released by PySAML2.