XML Message Spoofing Vulnerability in SimpleSAMLphp InfoCard Module
Summary
CVE-2017-12874: The InfoCard module 1.0 for SimpleSAMLphp allows attackers to spoof XML messages by leveraging an incorrect check of return values in signature validation utilities. Affects simplesamlphp across 2 version ranges.
< 1.14.11-1
< b8699d5258b2eaec87898febc7c88d26919a30d3
Fixed in 1.14.11-1. How to fix ↓
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Background
SimpleSAMLphp is an open-source application that provides a simple way to implement SAML-based Single Sign-On (SSO) and identity management. The InfoCard module, part of SimpleSAMLphp, allows users to manage their identities and access various services securely. However, a vulnerability in this module can lead to security risks, particularly in the validation of XML messages.
Vulnerability Detail
The vulnerability, identified as CVE-2017-12874, arises from an incorrect check of return values in the signature validation utilities of the InfoCard module. This flaw allows attackers to spoof XML messages, potentially leading to unauthorized access or manipulation of sensitive information. The severity of this vulnerability is underscored by its CVSS score of 7.5, indicating a high risk to affected systems.
How To Fix
Minimum fixed version
1.14.11-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade simplesamlphpTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate upgrading is not feasible, consider implementing strict input validation and monitoring for unusual XML message patterns as a temporary measure to mitigate the risk of exploitation until the upgrade can be performed.
Conclusion
The CVE-2017-12874 vulnerability in the SimpleSAMLphp InfoCard module poses a significant risk due to its potential for XML message spoofing. Users are strongly advised to upgrade to the latest version to protect their systems from exploitation. Utilizing tools like Vulert can further enhance security by providing real-time monitoring for vulnerabilities.
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FAQ
CVE-2017-12874 is a vulnerability in the InfoCard module of SimpleSAMLphp that allows attackers to spoof XML messages due to improper signature validation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability could lead to unauthorized access to sensitive information, identity theft, or manipulation of user identities.
It is recommended to upgrade to SimpleSAMLphp version 1.14.11-1 or later to mitigate the risk associated with this vulnerability.
Vulert is a tool that monitors and alerts for open-source vulnerabilities in software using a manifest file like package-lock.json. It helps developers stay informed about potential security risks.
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