urllib in Python 2.x through 2.7.16 supports the local_file: scheme, which makes it easier for remote attackers to bypass protection mechanisms that blacklist file: URIs, as demonstrated by triggering a urllib.urlopen('local_file:///etc/passwd') call.
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html
http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html
http://www.securityfocus.com/bid/107549
https://access.redhat.com/errata/RHSA-2019:1700
https://access.redhat.com/errata/RHSA-2019:2030
https://access.redhat.com/errata/RHSA-2019:3335
https://access.redhat.com/errata/RHSA-2019:3520
https://bugs.python.org/issue35907
https://github.com/python/cpython/pull/11842
https://lists.apache.org/thread.html/[email protected]%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html
https://lists.debian.org/debian-lts-announce/2019/07/msg00011.html
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html
https://seclists.org/bugtraq/2019/Oct/29
https://security.gentoo.org/glsa/202003-26
https://security.netapp.com/advisory/ntap-20190404-0004/
Source: MITRE
Published: 2019-03-23
Updated: 2020-08-24
Type: CWE-22
Base Score: 6.4
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N
Impact Score: 4.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 9.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Impact Score: 5.2
Exploitability Score: 3.9
Severity: CRITICAL