[USN-3990-2] urllib3 vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Mon Jul 29 15:09:48 UTC 2019

Ubuntu Security Notice USN-3990-2
July 29, 2019

python-urllib3 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM


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 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 ESM:
  python-urllib3                  1.7.1-1ubuntu4.1+esm1
  python3-urllib3                 1.7.1-1ubuntu4.1+esm1

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

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