USN-1314-1: Python 3 vulnerabilities

Releases

• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04

Packages

• 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)

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

• 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.

References

• CVE-2010-3493
• CVE-2011-1521

Related notices

• USN-1613-1: python2.5, python2.5-minimal
• USN-1613-2: python2.4, python2.4-minimal
• USN-1596-1: python2.6-minimal, python2.6
• USN-1592-1: python2.7-minimal, python2.7