USN-6473-2: pip vulnerabilities

USN-6473-1 fixed vulnerabilities in urllib3. This update provides the
corresponding updates for the urllib3 module bundled into pip.

Original advisory details:

It was discovered that urllib3 didn't strip HTTP Authorization header
on cross-origin redirects. A remote attacker could possibly use this
issue to obtain sensitive information. This issue only affected
Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-25091)

It was discovered that urllib3 didn't strip HTTP Cookie header on
cross-origin redirects. A remote attacker could possibly use this
issue to …

advisory attacker authorization cross-origin header http information issue lts origin pip redirects sensitive sensitive information ubuntu update updates usn vulnerabilities