CWE
79 362
Advisory Published

USN-1592-1: Python 2.7 vulnerabilities

First published: Tue Oct 02 2012(Updated: )

Niels Heinen discovered that the urllib and urllib2 modules would process Location headers that specify a redirection to file: URLs. A remote attacker could exploit this to obtain sensitive information or cause a denial of service. This issue only affected Ubuntu 11.04. (CVE-2011-1521) It was discovered that SimpleHTTPServer did not use a charset parameter in the Content-Type HTTP header. An attacker could potentially exploit this to conduct cross-site scripting (XSS) attacks against Internet Explorer 7 users. This issue only affected Ubuntu 11.04. (CVE-2011-4940) 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)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/python2.7-minimal<2.7.2-5ubuntu1.1
2.7.2-5ubuntu1.1
Ubuntu Ubuntu=11.10
All of
ubuntu/python2.7<2.7.2-5ubuntu1.1
2.7.2-5ubuntu1.1
Ubuntu Ubuntu=11.10
All of
ubuntu/python2.7-minimal<2.7.1-5ubuntu2.2
2.7.1-5ubuntu2.2
Ubuntu Ubuntu=11.04
All of
ubuntu/python2.7<2.7.1-5ubuntu2.2
2.7.1-5ubuntu2.2
Ubuntu Ubuntu=11.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-1592-1?

    The severity of USN-1592-1 is moderate.

  • How can a remote attacker exploit USN-1592-1?

    A remote attacker can exploit USN-1592-1 by sending a specially crafted header that specifies a redirection to a file: URL.

  • What is the impact of USN-1592-1?

    The impact of USN-1592-1 is that a remote attacker could obtain sensitive information or cause a denial of service.

  • Which versions of Python are affected by USN-1592-1?

    Python 2.7 versions up to 2.7.2-5ubuntu1.1 and 2.7.1-5ubuntu2.2 are affected by USN-1592-1.

  • How do I fix USN-1592-1?

    To fix USN-1592-1, you should update to Python 2.7 version 2.7.2-5ubuntu1.1 or 2.7.1-5ubuntu2.2, depending on your Ubuntu version.

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