USN-1297-1: Django vulnerabilities

9 December 2011

python-django vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


Applications using Django could be made to crash or expose sensitive information.

Software Description

  • python-django - High-level Python web development framework


Pall McMillan discovered that Django used the root namespace when storing cached session data. A remote attacker could exploit this to modify sessions. (CVE-2011-4136)

Paul McMillan discovered that Django would not timeout on arbitrary URLs when the application used URLFields. This could be exploited by a remote attacker to cause a denial of service via resource exhaustion. (CVE-2011-4137)

Paul McMillan discovered that while Django would check the validity of a URL via a HEAD request, it would instead use a GET request for the target of a redirect. This could potentially be used to trigger arbitrary GET requests via a crafted Location header. (CVE-2011-4138)

It was discovered that Django would sometimes use a request’s HTTP Host header to construct a full URL. A remote attacker could exploit this to conduct host header cache poisoning attacks via a crafted request. (CVE-2011-4139)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.10
python-django - 1.3-2ubuntu1.1
Ubuntu 11.04
python-django - 1.2.5-1ubuntu1.1
Ubuntu 10.10
python-django - 1.2.3-1ubuntu0.
Ubuntu 10.04 LTS
python-django - 1.1.1-2ubuntu1.4

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.