CVE-2015-5159: python-kdcproxy Denial of Service Vulnerability
Summary
CVE-2015-5159: python-kdcproxy before 0.3.2 allows remote attackers to cause a denial of service via a large POST request. Affects kdcproxy across 2 version ranges.
< 0.3.2
< f274aa6787cb8b3ec1cc12c440a56665b7231882
Fixed in f274aa6787cb8b3ec1cc12c440a56665b7231882. How to fix ↓
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Background
python-kdcproxy is a package available on PyPI that provides a proxy for Kerberos KDC (Key Distribution Center) requests. It allows clients to authenticate with a KDC server through a proxy, enabling secure communication. The package is commonly used in environments where a proxy is required to access the KDC server. However, versions prior to 0.3.2 are vulnerable to a denial of service (DoS) attack.
Vulnerability Detail
The vulnerability (CVE-2015-5159) in python-kdcproxy allows remote attackers to cause a denial of service by sending a large POST request. This can overwhelm the server and result in a loss of service availability. The vulnerability originates from a lack of input validation and proper handling of large requests. Attackers can exploit this vulnerability by sending specially crafted requests to the affected server, causing it to consume excessive resources and become unresponsive.
How To Fix
Minimum fixed version
f274aa6787cb8b3ec1cc12c440a56665b7231882
This is the first release that contains the fix.
pip install --upgrade "kdcproxy==f274aa6787cb8b3ec1cc12c440a56665b7231882"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to update to the fixed version of python-kdcproxy to mitigate the risk of a denial of service attack.
Conclusion
The python-kdcproxy package prior to version 0.3.2 is vulnerable to a denial of service attack. To mitigate this risk, it is crucial to update to version 0.3.2 or later. This update includes the necessary fixes to address the vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for kdcproxy →
FAQ
The vulnerability allows remote attackers to cause a denial of service, resulting in a loss of service availability for the affected server.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply provide your Pipfile.lock, and Vulert will analyze it for any open-source vulnerabilities, including this one.
No, versions prior to 0.3.2 are vulnerable. It is recommended to upgrade to version 0.3.2 or later to fix the vulnerability.
No, there is no known workaround. Updating to the fixed version is the recommended solution.
Yes, remote attackers can exploit this vulnerability by sending specially crafted large POST requests to the affected server.
