USN-3134-1: Python vulnerabilities

Ubuntu Security Notice USN-3134-1

22nd November, 2016

python2.7, python3.2, python3.4, python3.5 vulnerabilities

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

• Ubuntu 16.04 LTS
• 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
• python3.2 - An interactive high-level object-oriented language
• python3.4 - An interactive high-level object-oriented language
• python3.5 - An interactive high-level object-oriented language

Details

It was discovered that the smtplib library in Python did not return an
error when StartTLS fails. A remote attacker could possibly use this to
expose sensitive information. (CVE-2016-0772)

Rémi Rampin discovered that Python would not protect CGI applications
from contents of the HTTP_PROXY environment variable when based on
the contents of the Proxy header from HTTP requests. A remote attacker
could possibly use this to cause a CGI application to redirect outgoing
HTTP requests. (CVE-2016-1000110)

Insu Yun discovered an integer overflow in the zipimporter module in
Python that could lead to a heap-based overflow. An attacker could
use this to craft a special zip file that when read by Python could
possibly execute arbitrary code. (CVE-2016-5636)

Guido Vranken discovered that the urllib modules in Python did
not properly handle carriage return line feed (CRLF) in headers. A
remote attacker could use this to craft URLs that inject arbitrary
HTTP headers. This issue only affected Ubuntu 12.04 LTS and Ubuntu
14.04 LTS. (CVE-2016-5699)

Update instructions

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

Ubuntu 16.04 LTS:

libpython2.7-minimal 2.7.12-1ubuntu0~16.04.1

libpython3.5-stdlib 3.5.2-2ubuntu0~16.04.1

libpython2.7 2.7.12-1ubuntu0~16.04.1

libpython3.5-minimal 3.5.2-2ubuntu0~16.04.1

python2.7 2.7.12-1ubuntu0~16.04.1

python2.7-minimal 2.7.12-1ubuntu0~16.04.1

python3.5 3.5.2-2ubuntu0~16.04.1

python3.5-minimal 3.5.2-2ubuntu0~16.04.1

libpython3.5 3.5.2-2ubuntu0~16.04.1

libpython2.7-stdlib 2.7.12-1ubuntu0~16.04.1

Ubuntu 14.04 LTS:

libpython2.7-minimal 2.7.6-8ubuntu0.3

libpython2.7 2.7.6-8ubuntu0.3

python2.7 2.7.6-8ubuntu0.3

python3.4-minimal 3.4.3-1ubuntu1~14.04.5

python2.7-minimal 2.7.6-8ubuntu0.3

python3.4 3.4.3-1ubuntu1~14.04.5

libpython3.4-minimal 3.4.3-1ubuntu1~14.04.5

libpython3.4 3.4.3-1ubuntu1~14.04.5

libpython2.7-stdlib 2.7.6-8ubuntu0.3

libpython3.4-stdlib 3.4.3-1ubuntu1~14.04.5

Ubuntu 12.04 LTS:

libpython2.7 2.7.3-0ubuntu3.9

python2.7 2.7.3-0ubuntu3.9

python2.7-minimal 2.7.3-0ubuntu3.9

python3.2 3.2.3-0ubuntu3.8

python3.2-minimal 3.2.3-0ubuntu3.8

libpython3.2 3.2.3-0ubuntu3.8

To update your system, please follow these instructions: http://ift.tt/17VXqjU.

After a standard system update you need to restart any Python
applications to make all the necessary changes.

References

CVE-2016-0772, CVE-2016-1000110, CVE-2016-5636, CVE-2016-5699

from Ubuntu Security Notices http://ift.tt/2f3D9nJ