CVE-2010-4534: Django - Improper Restriction of Query String to Perform Object Filtering

Background

Django is a popular Python web framework that provides a high-level development environment for building web applications. It includes various components and modules to simplify common web development tasks. One of these components is the administrative interface (django.contrib.admin), which allows authorized users to manage and interact with the application's data models. However, prior to versions 1.1.3, 1.2.x before 1.2.4, and 1.3.x before 1.3 beta 1, Django's administrative interface had a vulnerability that could be exploited by remote authenticated users.

Vulnerability Detail

The vulnerability in Django's administrative interface arises from improper restriction of the use of query strings for object filtering. This means that remote authenticated users could manipulate the query string parameters to obtain sensitive information from the application. By crafting a series of requests containing regular expressions, an attacker could exploit the 'created_by__password__regex' parameter to retrieve sensitive data. This could potentially lead to unauthorized access, data leakage, or other security breaches.

pip install --upgrade "django==6.1.2"

Workaround

As a workaround, users can manually apply a patch or modify the affected code to address the vulnerability. However, it is strongly recommended to upgrade to the fixed versions mentioned above, as manual modifications may introduce errors or compatibility issues. Here is an example of a patch that addresses the vulnerability:

# Apply this patch to the affected code
from django.contrib.admin.views.main import ChangeList

def get_query_string(self, new_params=None, remove=None):
    if new_params is None:
        new_params = {}
    if remove is None:
        remove = []

    params = self.params.copy()
    for r in remove:
        for k in list(params):
            if k.startswith(r):
                del params[k]
    params.update(new_params)
    return '?' + '&'.join([f'{k}={v}' for k, v in params.items()])

ChangeList.get_query_string = get_query_string

Applying this patch modifies the 'get_query_string' method in the 'ChangeList' class of the 'django.contrib.admin.views.main' module to properly handle query string parameters and prevent the vulnerability.

Conclusion

In conclusion, the vulnerability in Django's administrative interface allows remote authenticated users to obtain sensitive information by manipulating query string parameters. To mitigate this vulnerability, it is crucial to upgrade to the fixed versions (1.1.3 or later, 1.2.4 or later, or 1.3 beta 1 or later) or apply the provided patch. For further support on vulnerability remediation, please contact DevNack.com.

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