USN-1616-1: Python 3.1 vulnerabilities

24 October 2012

python3.1 vulnerabilities

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

  • Ubuntu 11.04
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in Python 3.1.

Software Description

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

Details

It was discovered that Python would prepend an empty string to sys.path under certain circumstances. A local attacker with write access to the current working directory could exploit this to execute arbitrary code. This issue only affected Ubuntu 10.04 LTS. (CVE-2008-5983)

It was discovered that the audioop module did not correctly perform input validation. If a user or automatated system were tricked into opening a crafted audio file, an attacker could cause a denial of service via application crash. These issues only affected Ubuntu 10.04 LTS. (CVE-2010-1634, CVE-2010-2089)

It was discovered that Python distutils contained a race condition when creating the ~/.pypirc file. A local attacker could exploit this to obtain sensitive information. (CVE-2011-4944)

It was discovered that SimpleXMLRPCServer did not properly validate its input when handling HTTP POST requests. A remote attacker could exploit this to cause a denial of service via excessive CPU utilization. (CVE-2012-0845)

It was discovered that Python was susceptible to hash algorithm attacks. An attacker could cause a denial of service under certian circumstances. This update adds the ‘-R’ command line option and honors setting the PYTHONHASHSEED environment variable to ‘random’ to salt str and datetime objects with an unpredictable value. (CVE-2012-1150)

Serhiy Storchaka discovered that the UTF16 decoder in Python did not properly reset internal variables after error handling. An attacker could exploit this to cause a denial of service via memory corruption. (CVE-2012-2135)

Update instructions

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

Ubuntu 11.04
python3.1 - 3.1.3-1ubuntu1.2
python3.1-minimal - 3.1.3-1ubuntu1.2
Ubuntu 10.04 LTS
python3.1 - 3.1.2-0ubuntu3.2
python3.1-minimal - 3.1.2-0ubuntu3.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References