The get_image_dimensions 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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-3444
• http://www.debian.org/security/2012/dsa-2529
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:143
• http://www.openwall.com/lists/oss-security/2012/07/31/1
• http://www.openwall.com/lists/oss-security/2012/07/31/2
• http://www.ubuntu.com/usn/USN-1560-1
• django/django@9ca0ff6
• django/django@da33d67
• django/django@dd16b17
• django/django@b2eb478
• django/django@c14f325
• https://www.djangoproject.com/weblog/2012/jul/30/security-releases-issued