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AUSCERT External Security Bulletin Redistribution
ESB-2021.0714
USN-4754: Python updates
26 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: python
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Overwrite Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3177 CVE-2020-27619
Reference: ESB-2021.0647
ESB-2021.0533
ESB-2021.0489
Original Bulletin:
https://ubuntu.com/security/notices/USN-4754-1
https://ubuntu.com/security/notices/USN-4754-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
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USN-4754-1: Python vulnerabilities
25 February 2021
Python could be made to execute arbitrary code or denial of service if it
received a specially crafted input.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 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 incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
or cause a denial of service. ( CVE-2020-27619 , CVE-2021-3177 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o python3.8 - 3.8.6-1ubuntu0.2
o python3.8-minimal - 3.8.6-1ubuntu0.2
Ubuntu 20.04
o python3.8 - 3.8.5-1~20.04.2
o python3.8-minimal - 3.8.5-1~20.04.2
Ubuntu 18.04
o python2.7 - 2.7.17-1~18.04ubuntu1.3
o python2.7-minimal - 2.7.17-1~18.04ubuntu1.3
o python3.6 - 3.6.9-1~18.04ubuntu1.4
o python3.6-minimal - 3.6.9-1~18.04ubuntu1.4
Ubuntu 16.04
o python2.7 - 2.7.12-1ubuntu0~16.04.14
o python2.7-minimal - 2.7.12-1ubuntu0~16.04.14
o python3.5 - 3.5.2-2ubuntu0~16.04.13
o python3.5-minimal - 3.5.2-2ubuntu0~16.04.13
Ubuntu 14.04
o python2.7 - 2.7.6-8ubuntu0.6+esm8
o python2.7-minimal - 2.7.6-8ubuntu0.6+esm8
o python3.4 - 3.4.3-1ubuntu1~14.04.7+esm10
o python3.4-minimal - 3.4.3-1ubuntu1~14.04.7+esm10
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-3177
o CVE-2020-27619
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USN-4754-2: Python regression
25 February 2021
USN-4754-1 introduced a regression in Python2.7.
Releases
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
Packages
o python2.7 - An interactive high-level object-oriented language
Details
USN-4754-1 fixed a vulnerability in Python. The fix for CVE-2021-3177
introduced a
regression in Python 2.7. This update reverts the security fix pending further
investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
or cause a denial of service. ( CVE-2020-27619 , CVE-2021-3177 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o python2.7 - 2.7.17-1~18.04ubuntu1.5
o python2.7-minimal - 2.7.17-1~18.04ubuntu1.5
Ubuntu 16.04
o python2.7 - 2.7.12-1ubuntu0~16.04.16
o python2.7-minimal - 2.7.12-1ubuntu0~16.04.16
Ubuntu 14.04
o python2.7 - 2.7.6-8ubuntu0.6+esm9
o python2.7-minimal - 2.7.6-8ubuntu0.6+esm9
In general, a standard system update will make all the necessary changes.
References
o https://launchpad.net/bugs/1916893
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