Moderate Vulnerability in python3.11-cryptography: NULL-Dereference in PKCS7 Certificate Loading
Summary
RLSA-2024:3105: Moderate: python3.11-cryptography security update. Affects python3.11-cryptography versions < 0:37.0.2-6.el8. Fixed in 0:37.0.2-6.el8. How to fix ↓
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Background
The python3.11-cryptography package is a critical component of the Python ecosystem, providing developers with essential cryptographic primitives and recipes. This library is maintained by the Python Cryptographic Authority (PyCA) and is widely used for secure data handling in Python applications. However, it has been identified to have a vulnerability that could lead to severe security implications if not addressed promptly.
Vulnerability Detail
The vulnerability identified as CVE-2023-49083 is a NULL-dereference issue that occurs when loading PKCS7 certificates. This flaw can lead to application crashes and potentially expose sensitive data, making it a significant concern for developers relying on this library for cryptographic operations. The vulnerability arises from improper handling of certain inputs, which can be exploited by attackers to disrupt service or gain unauthorized access to information.
How To Fix
Minimum fixed version
0:37.0.2-6.el8
This is the first release that contains the fix.
sudo dnf update python3.11-cryptographyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, if you cannot immediately update the package, consider implementing input validation to ensure that only properly formatted PKCS7 certificates are processed. This can help mitigate the risk of triggering the NULL-dereference issue until a full update can be applied.
Conclusion
The python3.11-cryptography package has a moderate vulnerability (CVE-2023-49083) that can lead to NULL-dereference issues when loading PKCS7 certificates. It is crucial for developers to update to the patched version to mitigate risks. Regular updates and monitoring for vulnerabilities are essential for maintaining application security.
See every vulnerability recorded for python3.11-cryptography →
FAQ
CVE-2023-49083 is a vulnerability in the python3.11-cryptography package that leads to a NULL-dereference when loading PKCS7 certificates.
The vulnerability can cause application crashes and may expose sensitive data, posing a significant risk to applications that rely on this library.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for this vulnerability is 7.5, indicating a moderate severity level.
It is recommended to regularly check for updates and apply them promptly to ensure that your applications are protected against known vulnerabilities.
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