CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL.
blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html
lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
rhn.redhat.com/errata/RHSA-2016-1626.html
rhn.redhat.com/errata/RHSA-2016-1627.html
rhn.redhat.com/errata/RHSA-2016-1628.html
rhn.redhat.com/errata/RHSA-2016-1629.html
rhn.redhat.com/errata/RHSA-2016-1630.html
www.openwall.com/lists/oss-security/2016/06/14/7
www.openwall.com/lists/oss-security/2016/06/15/12
www.openwall.com/lists/oss-security/2016/06/16/2
www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
www.securityfocus.com/bid/91226
www.splunk.com/view/SP-CAAAPSV
www.splunk.com/view/SP-CAAAPUE
docs.python.org/3.4/whatsnew/changelog.html#python-3-4-4
hg.python.org/cpython/raw-file/v2.7.10/Misc/NEWS
hg.python.org/cpython/rev/1c45047c5102
hg.python.org/cpython/rev/bf3e1c9b80e9
lists.debian.org/debian-lts-announce/2019/02/msg00011.html