The (1) django.http.HttpResponseRedirect and (2) django.http.HttpResponsePermanentRedirect classes in Django before 1.3.2 and 1.4.x before 1.4.1 do not validate the scheme of a redirect target, which might allow remote attackers to conduct cross-site scripting (XSS) attacks via a data: URL.

The django.forms.ImageField class in the form system in Django before 1.3.2 and 1.4.x before 1.4.1 completely decompresses image data during image validation, which allows remote attackers to cause a denial of service (memory consumption) by uploading an image file.

The password reset functionality in django.contrib.auth in Django before 1.1.3, 1.2.x before 1.2.4, and 1.3.x before 1.3 beta 1 does not validate the length of a string representing a base36 timestamp, which allows remote attackers to cause a denial of service (resource consumption) via a URL that specifies a large base36 integer.

As of the 1.2 release, the core Django framework includes a system, enabled by default, for detecting and preventing cross-site request forgery (CSRF) attacks against Django-powered applications. Previous Django releases provided a different, optionally-enabled system for the same purpose.

The Django 1.2 CSRF protection system involves the generation of a random token, inserted as a hidden field in outgoing forms. The same value is also set in a cookie, and the cookie value and form value are compared on submission.

The provided template tag for inserting the CSRF token into forms -- {% csrftoken %} -- explicitly trusts the cookie value, and displays it as-is. Thus, an attacker who is able to tamper with the value of the CSRF cookie can cause arbitrary content to be inserted, unescaped, into the outgoing HTML of the form, enabling cross-site scripting (XSS) attacks.

This issue was first reported via a public ticket in Django's Trac instance; while being triaged it was then independently reported, with broader description, by Jeff Balogh of Mozilla.

http://www.djangoproject.com/weblog/2010/sep/08/security-release/

Description of problem:

http://www.djangoproject.com/weblog/2010/dec/22/security/

The getimagedimensions function in the image-handling functionality in Django before 1.3.2 and 1.4.x before 1.4.1 uses a constant chunk size in all attempts to determine dimensions, which allows remote attackers to cause a denial of service (process or thread consumption) via a large TIFF image.