Denial of Service Vulnerability in Python OAuthLib - CVE-2022-36087
Summary
UBUNTU-CVE-2022-36087: OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. Affects python-oauthlib versions < 3.2.0-1ubuntu0.1. Fixed in 3.2.0-1ubuntu0.1. How to fix ↓
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Background
Python OAuthLib is a library that implements OAuth request-signing logic for Python applications, specifically designed for versions 3.6 and above. It allows developers to integrate OAuth 2.0 authentication into their applications, providing a secure method for users to authorize third-party access to their resources without sharing their credentials. The library is widely used in various applications that require secure user authentication and authorization.
Vulnerability Detail
The vulnerability identified as CVE-2022-36087 affects OAuthLib versions 3.1.1 through 3.2.1. It arises from the handling of malicious redirect URIs, which can lead to a denial of service (DoS) attack. An attacker can exploit this vulnerability by providing a specially crafted redirect URI that causes the application to become unresponsive. This issue is particularly concerning for applications that utilize OAuth 2.0 provider support or directly use the 'uri_validate' functions, as they are susceptible to this attack. The vulnerability has a CVSS score of 6.5, indicating a medium severity level.
How To Fix
Minimum fixed version
3.2.0-1ubuntu0.1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python-oauthlibTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There are no known workarounds for this vulnerability. The best course of action is to update to the patched version as mentioned above.
Conclusion
CVE-2022-36087 represents a significant vulnerability in the Python OAuthLib library that can lead to denial of service attacks. Users are strongly encouraged to update to the latest patched version to mitigate this risk. Regular monitoring and updates are essential to maintaining the security of applications that rely on OAuth for user authentication.
See every vulnerability recorded for python-oauthlib →
FAQ
CVE-2022-36087 is a vulnerability in the Python OAuthLib library that can lead to denial of service due to improper handling of malicious redirect URIs.
OAuthLib versions 3.1.1 through 3.2.1 are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
It is recommended to prioritize updating the package to the patched version as soon as possible, as there are no known workarounds for this vulnerability.
Vulert is a service that monitors and alerts in real-time for open-source vulnerabilities in software using a manifest file like package-lock.json, providing an easy way to stay informed about potential security issues.
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