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AUSCERT External Security Bulletin Redistribution
ESB-2020.2511
USN-4428-1: Python vulnerabilities
23 July 2020
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AusCERT Security Bulletin Summary
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Product: Python
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-14422 CVE-2019-20907 CVE-2019-17514
CVE-2019-9674
Reference: ESB-2020.2465
ESB-2020.0765
Original Bulletin:
https://usn.ubuntu.com/4428-1/
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USN-4428-1: Python vulnerabilities
22 July 2020
Several security issues were fixed in Python.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Packages
o python2.7 - An interactive high-level object-oriented language
o python3.4 - An interactive high-level object-oriented language
o python3.5 - An interactive high-level object-oriented language
o python3.6 - An interactive high-level object-oriented language
o python3.8 - Interactive high-level object-oriented language (version 3.8)
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
o python3.8 - 3.8.2-1ubuntu1.2
o python3.8-minimal - 3.8.2-1ubuntu1.2
Ubuntu 18.04
o python2.7 - 2.7.17-1~18.04ubuntu1.1
o python2.7-minimal - 2.7.17-1~18.04ubuntu1.1
o python3.6 - 3.6.9-1~18.04ubuntu1.1
o python3.6-minimal - 3.6.9-1~18.04ubuntu1.1
Ubuntu 16.04
o python2.7 - 2.7.12-1ubuntu0~16.04.12
o python2.7-minimal - 2.7.12-1ubuntu0~16.04.12
o python3.5 - 3.5.2-2ubuntu0~16.04.11
o python3.5-minimal - 3.5.2-2ubuntu0~16.04.11
Ubuntu 14.04
o python2.7 - 2.7.6-8ubuntu0.6+esm6
o python2.7-minimal - 2.7.6-8ubuntu0.6+esm6
o python3.4 - 3.4.3-1ubuntu1~14.04.7+esm7
o python3.4-minimal - 3.4.3-1ubuntu1~14.04.7+esm7
Ubuntu 12.04
o python2.7 - 2.7.3-0ubuntu3.18
o python2.7-minimal - 2.7.3-0ubuntu3.18
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-20907
o CVE-2019-9674
o CVE-2019-17514
o CVE-2020-14422
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