Ubuntu 19.10: USN-4333-1 Critical: Python DoS and Injection

ubuntu

April 21, 2020

Several security issues were fixed in Python.

Summary

Several security issues were fixed in Python.

Software Description:

- python3.7: An interactive high-level object-oriented language

- 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 incorrectly stripped certain characters from

requests. A remote attacker could use this issue to perform CRLF injection.

(CVE-2019-18348)

It was discovered that Python incorrectly handled certain HTTP requests.

An attacker could possibly use this issue to cause a denial of service.

(CVE-2020-8492)

Topics Covered

security advisory denial of service remote attack ubuntu python

Update Instructions

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

Ubuntu 19.10:
  python3.7                       3.7.5-2~19.10ubuntu1
  python3.7-minimal               3.7.5-2~19.10ubuntu1

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

Ubuntu 16.04 LTS:
  python2.7                       2.7.12-1ubuntu0~16.04.11
  python2.7-minimal               2.7.12-1ubuntu0~16.04.11
  python3.5                       3.5.2-2ubuntu0~16.04.10
  python3.5-minimal               3.5.2-2ubuntu0~16.04.10

Ubuntu 14.04 ESM:
  python2.7                       2.7.6-8ubuntu0.6+esm5
  python2.7-minimal               2.7.6-8ubuntu0.6+esm5
  python3.4                       3.4.3-1ubuntu1~14.04.7+esm6
  python3.4-minimal               3.4.3-1ubuntu1~14.04.7+esm6

Ubuntu 12.04 ESM:
  python2.7                       2.7.3-0ubuntu3.17
  python2.7-minimal               2.7.3-0ubuntu3.17

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