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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
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 for Python
Details:
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.
(CVE-2019-11236)
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.
References:
https://usn.ubuntu.com/3990-2
https://usn.ubuntu.com/3990-1
CVE-2019-11236
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