[USN-3817-2] Python vulnerabilities

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-3817-2
November 15, 2018

python2.7 vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Python.

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

Details:

USN-3817-1 fixed a vulnerability in Python. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that Python incorrectly handled large amounts of
 data. A remote attacker could use this issue to cause Python to crash,
 resulting in a denial of service, or possibly execute arbitrary code.
 (CVE-2018-1000030)

 It was discovered that Python incorrectly handled running external
 commands in the shutil module. A remote attacker could use this issue
 to cause Python to crash, resulting in a denial of service, or
 possibly execute arbitrary code. (CVE-2018-1000802)

 It was discovered that Python incorrectly used regular expressions
 vulnerable to catastrophic backtracking. A remote attacker could
 possibly use this issue to cause a denial of service. (CVE-2018-1060,
 CVE-2018-1061)

 It was discovered that Python failed to initialize Expat's hash salt.
 A remote attacker could possibly use this issue to cause hash
 collisions, leading to a denial of service. (CVE-2018-14647)

Update instructions:

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

Ubuntu 12.04 ESM:
  python2.7                       2.7.3-0ubuntu3.11
  python2.7-minimal               2.7.3-0ubuntu3.11

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

References:
  https://usn.ubuntu.com/usn/usn-3817-2
  https://usn.ubuntu.com/usn/usn-3817-1
  CVE-2018-1000030, CVE-2018-1000802, CVE-2018-1060, CVE-2018-1061,
  CVE-2018-14647
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