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Ubuntu Security Notice USN-4428-1

Ubuntu Security Notice USN-4428-1
Posted Jul 22, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4428-1 - It was discovered that Python documentation had a misleading information. A security issue could be possibly caused by wrong assumptions of this information. This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that Python incorrectly handled certain TAR archives. An attacker could possibly use this issue to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, python
systems | linux, ubuntu
advisories | CVE-2019-17514, CVE-2019-20907, CVE-2019-9674, CVE-2020-14422
SHA-256 | bd0ca3aa125b7eb221c2efb45192de20cbb57e4b69e622b348f061fab6792867

Ubuntu Security Notice USN-4428-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4428-1
July 22, 2020

python2.7, python3.4, python3.5, python3.6, python3.8 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Python.

Software Description:
- python3.8: Interactive high-level object-oriented language (version 3.8)
- python2.7: An interactive high-level object-oriented language
- python3.6: An interactive high-level object-oriented language
- python3.5: An interactive high-level object-oriented language
- python3.4: An interactive high-level object-oriented language

Details:

It was discovered that Python documentation had a misleading information.
A security issue could be possibly caused by wrong assumptions of this information.
This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2019-17514)

It was discovered that Python incorrectly handled certain TAR archives.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2019-20907)

It was discovered that incorrectly handled certain ZIP files. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
(CVE-2019-9674)

It was discovered that Python incorrectly handled certain IP values.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-14422)

Update instructions:

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

Ubuntu 20.04 LTS:
python3.8 3.8.2-1ubuntu1.2
python3.8-minimal 3.8.2-1ubuntu1.2

Ubuntu 18.04 LTS:
python2.7 2.7.17-1~18.04ubuntu1.1
python2.7-minimal 2.7.17-1~18.04ubuntu1.1
python3.6 3.6.9-1~18.04ubuntu1.1
python3.6-minimal 3.6.9-1~18.04ubuntu1.1

Ubuntu 16.04 LTS:
python2.7 2.7.12-1ubuntu0~16.04.12
python2.7-minimal 2.7.12-1ubuntu0~16.04.12
python3.5 3.5.2-2ubuntu0~16.04.11
python3.5-minimal 3.5.2-2ubuntu0~16.04.11

Ubuntu 14.04 ESM:
python2.7 2.7.6-8ubuntu0.6+esm6
python2.7-minimal 2.7.6-8ubuntu0.6+esm6
python3.4 3.4.3-1ubuntu1~14.04.7+esm7
python3.4-minimal 3.4.3-1ubuntu1~14.04.7+esm7

Ubuntu 12.04 ESM:
python2.7 2.7.3-0ubuntu3.18
python2.7-minimal 2.7.3-0ubuntu3.18

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

References:
https://usn.ubuntu.com/4428-1
CVE-2019-17514, CVE-2019-20907, CVE-2019-9674, CVE-2020-14422

Package Information:
https://launchpad.net/ubuntu/+source/python3.8/3.8.2-1ubuntu1.2
https://launchpad.net/ubuntu/+source/python2.7/2.7.17-1~18.04ubuntu1.1
https://launchpad.net/ubuntu/+source/python3.6/3.6.9-1~18.04ubuntu1.1
https://launchpad.net/ubuntu/+source/python2.7/2.7.12-1ubuntu0~16.04.12
https://launchpad.net/ubuntu/+source/python3.5/3.5.2-2ubuntu0~16.04.11
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