Ubuntu 11.04 LTS USN-1314-1 High Severity: Python Exploits

ubuntu

December 20, 2011

Applications using certain Python 3 modules could be made to crash or expose sensitive information over the network.

Summary

Applications using certain Python 3 modules could be made to crash or

expose sensitive information over the network.

Software Description:

- python3.1: An interactive high-level object-oriented language (version 3.1)

- python3.2: An interactive high-level object-oriented language (version 3.2)

Details:

Giampaolo Rodola discovered that the smtpd module in Python 3 did not

properly handle certain error conditions. A remote attacker could exploit

this to cause a denial of service via daemon outage. This issue only

affected Ubuntu 10.04 LTS. (CVE-2010-3493)

Niels Heinen discovered that the urllib module in Python 3 would process

Location headers that specify a file:// URL. A remote attacker could use

this to obtain sensitive information or cause a denial of service via

resource consumption. (CVE-2011-1521)

Topics Covered

security advisory denial of service high severity ubuntu python

Update Instructions

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

Ubuntu 11.04:
  python3.1-minimal               3.1.3-1ubuntu1.1
  python3.2-minimal               3.2-1ubuntu1.1

Ubuntu 10.10:
  python3.1-minimal               3.1.2+20100915-0ubuntu4.1

Ubuntu 10.04 LTS:
  python3.1-minimal               3.1.2-0ubuntu3.1

In general, a standard system update will make all the necessary changes.
Daemons using the urllib or smtpd modules may also need to be restarted
after a pplying this update.