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Ubuntu Security Notice USN-2653-1
June 25, 2015

python2.7, python3.2, python3.4 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Python.

Software Description:
- python2.7: An interactive high-level object-oriented language
- python3.4: An interactive high-level object-oriented language
- python3.2: An interactive high-level object-oriented language

Details:

It was discovered that multiple Python protocol libraries incorrectly
limited certain data when connecting to servers. A malicious ftp, http,
imap, nntp, pop or smtp server could use this issue to cause a denial of
service. (CVE-2013-1752)

It was discovered that the Python xmlrpc library did not limit unpacking
gzip-compressed HTTP bodies. A malicious server could use this issue to
cause a denial of service. (CVE-2013-1753)

It was discovered that the Python json module incorrectly handled a certain
argument. An attacker could possibly use this issue to read arbitrary
memory and expose sensitive information. This issue only affected Ubuntu
12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-4616)

It was discovered that the Python CGIHTTPServer incorrectly handled
URL-encoded path separators in URLs. A remote attacker could use this issue
to expose sensitive information, or possibly execute arbitrary code. This
issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-4650)

It was discovered that Python incorrectly handled sizes and offsets in
buffer functions. An attacker could possibly use this issue to read
arbitrary memory and obtain sensitive information. This issue only affected
Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-7185)

Update instructions:

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

Ubuntu 14.10:
  python2.7                       2.7.8-10ubuntu1.1
  python2.7-minimal               2.7.8-10ubuntu1.1
  python3.4                       3.4.2-1ubuntu0.1
  python3.4-minimal               3.4.2-1ubuntu0.1

Ubuntu 14.04 LTS:
  python2.7                       2.7.6-8ubuntu0.2
  python2.7-minimal               2.7.6-8ubuntu0.2
  python3.4                       3.4.0-2ubuntu1.1
  python3.4-minimal               3.4.0-2ubuntu1.1

Ubuntu 12.04 LTS:
  python2.7                       2.7.3-0ubuntu3.8
  python2.7-minimal               2.7.3-0ubuntu3.8
  python3.2                       3.2.3-0ubuntu3.7
  python3.2-minimal               3.2.3-0ubuntu3.7

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

References:
  http://www.ubuntu.com/usn/usn-2653-1
  CVE-2013-1752, CVE-2013-1753, CVE-2014-4616, CVE-2014-4650,
  CVE-2014-7185

Package Information:
  https://launchpad.net/ubuntu/+source/python2.7/2.7.8-10ubuntu1.1
  https://launchpad.net/ubuntu/+source/python3.4/3.4.2-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/python2.7/2.7.6-8ubuntu0.2
  https://launchpad.net/ubuntu/+source/python3.4/3.4.0-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/python2.7/2.7.3-0ubuntu3.8
  https://launchpad.net/ubuntu/+source/python3.2/3.2.3-0ubuntu3.7