Operating System:

[Ubuntu]

Published:

10 October 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3786
                    USN-4151-1: Python vulnerabilities
                              10 October 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Python
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
                   Reduced Security     -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-16935 CVE-2019-16056 

Reference:         ESB-2019.3520

Original Bulletin: 
   https://usn.ubuntu.com/4151-1/

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USN-4151-1: Python vulnerabilities
9 October 2019

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

  o Ubuntu 19.04
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Python.

Software Description

  o python2.7 - An interactive high-level object-oriented language
  o python3.7 - An interactive high-level object-oriented language
  o python3.6 - An interactive high-level object-oriented language
  o python3.5 - An interactive high-level object-oriented language

Details

It was discovered that Python incorrectly parsed certain email addresses. A
remote attacker could possibly use this issue to trick Python applications into
accepting email addresses that should be denied. (CVE-2019-16056)

It was discovered that the Python documentation XML-RPC server incorrectly
handled certain fields. A remote attacker could use this issue to execute a
cross-site scripting (XSS) attack. (CVE-2019-16935)

Update instructions

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

Ubuntu 19.04
    python2.7 - 2.7.16-2ubuntu0.2
    python2.7-minimal - 2.7.16-2ubuntu0.2
    python3.7 - 3.7.3-2ubuntu0.2
    python3.7-minimal - 3.7.3-2ubuntu0.2
Ubuntu 18.04 LTS
    python2.7 - 2.7.15-4ubuntu4~18.04.2
    python2.7-minimal - 2.7.15-4ubuntu4~18.04.2
    python3.6 - 3.6.8-1~18.04.3
    python3.6-minimal - 3.6.8-1~18.04.3
Ubuntu 16.04 LTS
    python2.7 - 2.7.12-1ubuntu0~16.04.9
    python2.7-minimal - 2.7.12-1ubuntu0~16.04.9
    python3.5 - 3.5.2-2ubuntu0~16.04.9
    python3.5-minimal - 3.5.2-2ubuntu0~16.04.9

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

References

  o CVE-2019-16056
  o CVE-2019-16935

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