CVE-2017-1000246: Weak Encryption in pysaml2
Summary
CVE-2017-1000246: Python package pysaml2 version 4.4.0 and earlier reuses the initialization vector across encryptions in the IDP server, resulting in weak encryption of data. Affects pysaml2 versions < 4.6.0. Fixed in 4.6.0. How to fix ↓
Also tracked for
- python-pysaml2 · Debian:11
The same CVE-2017-1000246 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
pysaml2 is a Python package available on PyPI that provides functionality for implementing SAML2 service providers and identity providers. It is widely used for integrating SAML2-based authentication and authorization into Python applications. However, versions 4.4.0 and earlier of pysaml2 suffer from a vulnerability that results in weak encryption of data. This vulnerability arises from the reuse of the initialization vector (IV) across encryptions in the IDP server.
Vulnerability Detail
The vulnerability in pysaml2 version 4.4.0 and earlier allows an attacker to exploit weak encryption of data. By reusing the IV, the encryption becomes predictable and susceptible to attacks. This can lead to unauthorized access to sensitive information, such as user credentials or session data. The impact of this vulnerability can be severe, compromising the security and integrity of the SAML2-based authentication and authorization process.
How To Fix
Minimum fixed version
4.6.0
This is the first release that contains the fix.
pip install --upgrade "pysaml2==4.6.0"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. However, implementing additional security measures such as using a secure transport layer (e.g., HTTPS) and regularly monitoring and auditing the SAML2 implementation can help mitigate the risk associated with this vulnerability.
Conclusion
The vulnerability in pysaml2 version 4.4.0 and earlier exposes weak encryption of data, potentially leading to unauthorized access to sensitive information. To mitigate this vulnerability, it is crucial to upgrade to version 4.6.0 or later of pysaml2. Implementing additional security measures and regularly monitoring the SAML2 implementation can further enhance the security of the system. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for pysaml2 →
FAQ
pysaml2 is a Python package that provides functionality for implementing SAML2 service providers and identity providers. It is commonly used for integrating SAML2-based authentication and authorization into Python applications.
The vulnerability allows for weak encryption of data, potentially leading to unauthorized access to sensitive information and compromising the security and integrity of the SAML2-based authentication and authorization process.
To fix this vulnerability, it is recommended to upgrade to version 4.6.0 or later of pysaml2. This upgrade includes changes to ensure that a unique initialization vector (IV) is used for each encryption, strengthening the encryption process and mitigating the vulnerability.
While no specific workaround is mentioned for this vulnerability, implementing additional security measures such as using a secure transport layer (e.g., HTTPS) and regularly monitoring and auditing the SAML2 implementation can help mitigate the risk associated with this vulnerability.
For more information about this vulnerability, you can refer to the official advisory in the PyPI advisory database: https://github.com/pypa/advisory-database/blob/main/vulns/pysaml2/PYSEC-2017-26.yaml
References
Related vulnerabilities
Recent vulnerabilities recorded for pysaml2.
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