has found a information leakage vulnerability in the Django admin interface.
The Django administrative interface, django.contrib.admin, supports filtering of displayed lists of objects by fields on the corresponding models, including across database-level relationships. This is implemented by passing lookup arguments in the querystring portion of the URL, and options on the ModelAdmin class allow developers to specify particular fields or relationships which will generate automatic links for filtering.
One historically-undocumented and -unofficially-supported feature has been the ability for a user with sufficient knowledge of a model's structure and the format of these lookup arguments to invent useful new filters on the fly by manipulating the querystring.
As reported to us by Adam Baldwin, however, this can be abused to gain access to information outside of an admin user's permissions; for example, an attacker with access to the admin and sufficient knowledge of model structure and relations could construct querystrings which -- with repeated use of regular-expression lookups supported by the Django database API -- expose sensitive information such as users' password hashes.
You can view the full details on the Django Project site.
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