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Ubuntu 20.04 LTS: USN-4570-1 Moderate: urllib3 CRLF Injection

ubuntu
Calendar Grey October 5, 2020
Dist Ubuntu Esm H88
Debian Security Announcement DSA-4823-1 highlights a vulnerability in python-requests related to header injection. It is crucial to update your system for protection.
urllib3 could be used to perform a CRLF injection if it received a specially crafted request.

Summary

urllib3 could be used to perform a CRLF injection if it received a

specially crafted request.

Software Description:

- python-urllib3: HTTP library with thread-safe connection pooling

Details:

It was discovered that urllib3 incorrectly handled certain character

sequences. A remote attacker could possibly use this issue to perform CRLF

injection.

Topics%20covered

Topics Covered

security advisory remote access Ubuntu update instructions attack vector CRLF injection python-urllib3

Update Instructions

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

Ubuntu 20.04 LTS:
  python3-urllib3                 1.25.8-2ubuntu0.1

Ubuntu 18.04 LTS:
  python-urllib3                  1.22-1ubuntu0.18.04.2
  python3-urllib3                 1.22-1ubuntu0.18.04.2

Ubuntu 16.04 LTS:
  python-urllib3                  1.13.1-2ubuntu0.16.04.4
  python3-urllib3                 1.13.1-2ubuntu0.16.04.4

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

References

https://ubuntu.com/security/notices/USN-4570-1

CVE-2020-26137

Severity
important
Lowest
Low
Medium
High
Critical

October 05, 2020

Topics%20covered

Topics Covered

security advisory remote access Ubuntu update instructions attack vector CRLF injection python-urllib3

Package Information

https://launchpad.net/ubuntu/+source/python-urllib3/1.25.8-2ubuntu0.1
https://launchpad.net/ubuntu/+source/python-urllib3/1.22-1ubuntu0.18.04.2
https://launchpad.net/ubuntu/+source/python-urllib3/1.13.1-2ubuntu0.16.04.4

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