CVE-2015-2674: Restkit TLS Server Spoofing Vulnerability
Summary
CVE-2015-2674: Restkit allows man-in-the-middle attackers to spoof TLS servers by leveraging use of the ssl.wrap_socket function in Python with the default CERT_NONE value for the cert_reqs argument. Affects restkit versions >= 1.0.0. No fix is published. How to fix ↓
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Background
Restkit is a Python package available on PyPI that provides a framework for interacting with RESTful APIs. It offers features such as request/response handling, authentication, and error handling. The package has been widely used for building web applications and services.
Vulnerability Detail
The vulnerability (CVE-2015-2674) in Restkit allows man-in-the-middle attackers to spoof TLS servers. This is possible due to the use of the ssl.wrap_socket function in Python with the default CERT_NONE value for the cert_reqs argument. By exploiting this vulnerability, an attacker can intercept and modify the communication between the client and the server, potentially leading to unauthorized access, data leakage, or other malicious activities.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If upgrading to a patched version of Restkit is not immediately feasible, a possible workaround is to manually modify the code that uses the ssl.wrap_socket function. By setting the cert_reqs argument to CERT_REQUIRED instead of CERT_NONE, the TLS server spoofing vulnerability can be mitigated. Here is an example of how to modify the code:
import ssl
# Existing code
ssl.wrap_socket(sock, cert_reqs=ssl.CERT_NONE)
# Modified code
ssl.wrap_socket(sock, cert_reqs=ssl.CERT_REQUIRED)
Conclusion
The TLS server spoofing vulnerability in Restkit (CVE-2015-2674) can be exploited by attackers to impersonate servers and manipulate communication. It is crucial to update Restkit to a patched version or apply the recommended workaround to mitigate the risk. For further assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows attackers to impersonate TLS servers and intercept or modify the communication between clients and servers. This can lead to unauthorized access, data leakage, or other malicious activities.
The vulnerability was introduced in Restkit version 1.0.0. Prior versions may also be affected.
While specific exploits targeting this vulnerability may exist, there are no publicly known exploits at the time of this report. However, it is important to address the vulnerability promptly to mitigate the risk.
Yes, the maintainers of Restkit have released patched versions of the package that address this vulnerability. It is recommended to update to the latest version to ensure the vulnerability is fixed.
Yes, a temporary workaround is to modify the code that uses the ssl.wrap_socket function. By setting the cert_reqs argument to CERT_REQUIRED instead of CERT_NONE, the vulnerability can be mitigated. However, upgrading to a patched version of Restkit is the recommended long-term solution.
