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USN-3990-2: urllib3 vulnerability

29 July 2019

urllib3 could be used to perform a CRLF injection if it received a specially crafted request.



  • python-urllib3 - HTTP library with thread-safe connection pooling for Python


USN-3990-1 fixed a vulnerability in urllib3. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that urllib3 incorrectly stripped certain characters from
requests. A remote attacker could use this issue to perform CRLF injection.

Update instructions

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

Ubuntu 14.04

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


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