[Security] Bump django from 1.11.21 to 1.11.23

[dependabot-preview]

Bumps django from 1.11.21 to 1.11.23. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects django
An issue was discovered in Django 1.11.x before 1.11.23, 2.1.x before 2.1.11, and 2.2.x before 2.2.4. Due to the behaviour of the underlying HTMLParser, django.utils.html.strip_tags would be extremely slow to evaluate certain inputs containing large sequences of nested incomplete HTML entities.

Affected versions: >= 1.11.0, < 1.11.23

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects django
An issue was discovered in Django 1.11.x before 1.11.23, 2.1.x before 2.1.11, and 2.2.x before 2.2.4. If passed certain inputs, django.utils.encoding.uri_to_iri could lead to significant memory usage due to a recursion when repercent-encoding invalid UTF-8 octet sequences.

Affected versions: >= 1.11.0, < 1.11.23

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects django
An issue was discovered in Django 1.11.x before 1.11.23, 2.1.x before 2.1.11, and 2.2.x before 2.2.4. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.

Affected versions: >= 1.11.0, < 1.11.23

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects django
An issue was discovered in Django 1.11 before 1.11.22, 2.1 before 2.1.10, and 2.2 before 2.2.3. An HTTP request is not redirected to HTTPS when the SECURE_PROXY_SSL_HEADER and SECURE_SSL_REDIRECT settings are used, and the proxy connects to Django via HTTPS. In other words, django.http.HttpRequest.scheme has incorrect behavior when a client uses HTTP.

Affected versions: >= 1.11.0, < 1.11.22

Commits

• 9748977 [1.11.x] Bumped version for 1.11.23 release.
• 869b34e [1.11.x] Fixed CVE-2019-14235 -- Fixed potential memory exhaustion in django....
• ed682a2 [1.11.x] Fixed CVE-2019-14234 -- Protected JSONField/HStoreField key and inde...
• 52479ac [1.11.x] Fixed CVE-2019-14233 -- Prevented excessive HTMLParser recursion in ...
• 42a66e9 [1.11.X] Fixed CVE-2019-14232 -- Adjusted regex to avoid backtracking issues ...
• 693046e [1.11.x] Added stub release notes for security releases.
• 6d054b5 [1.11.x] Added CVE-2019-12781 to the security release archive.
• 7c849b9 [1.11.x] Post-release version bump.
• 480380c [1.11.x] Bumped version for 1.11.22 release.
• 32124fc [1.11.x] Fixed CVE-2019-12781 -- Made HttpRequest always trust SECURE_PROXY_S...
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 42.708% when pulling b2c84cf on dependabot/pip/develop/django-1.11.23 into f918daa on develop.