[Security] Bump bleach from 2.1.3 to 3.1.1

[dependabot-preview]

Bumps bleach from 2.1.3 to 3.1.1. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects bleach

Impact

A mutation XSS affects users calling bleach.clean with noscript and a raw tag (see below) in the allowed/whitelisted tags option.

Patches

v3.1.1

Workarounds

• modify bleach.clean calls to not whitelist noscript and one or more of the following raw tags:

title
textarea
script
style
noembed
noframes
iframe
</tr></table> ... (truncated)
Affected versions: < 3.1.1

Sourced from The GitHub Security Advisory Database.

Critical severity vulnerability that affects bleach An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly sanitized if the values contained character entities. Using character entities, it was possible to construct a URI value with a scheme that was not allowed that would slide through unsanitized.

Affected versions: >= 2.1.0, < 2.1.4

Changelog

Sourced from bleach's changelog.

Version 3.1.1 (February 13th, 2020)

Security fixes

• bleach.clean behavior parsing noscript tags did not match browser behavior.

  Calls to bleach.clean allowing noscript and one or more of the raw text tags (title, textarea, script, style, noembed, noframes, iframe, and xmp) were vulnerable to a mutation XSS.

  This security issue was confirmed in Bleach versions v2.1.4, v3.0.2, and v3.1.0. Earlier versions are probably affected too.

  Anyone using Bleach <=v3.1.0 is highly encouraged to upgrade.

  https://bugzilla.mozilla.org/show_bug.cgi?id=1615315

Backwards incompatible changes

None

Features

None

Bug fixes

None

Bleach changes

Version 3.1.0 (January 9th, 2019)

Security fixes

None

Backwards incompatible changes

None

Features

• Add recognized_tags argument to the linkify Linker class. This fixes issues when linkifying on its own and having some tags get escaped.

... (truncated)

Commits

• 0d88dd8 Update for v3.1.1 release
• 996cde7 fix bug 1615315
• 2f210e0 Merge pull request #435 from willkg/3_1_0_release
• ad910ce Update for 3.1.0 release
• 948b745 Merge pull request #433 from willkg/357-doctest
• 245c21c Fix doctest failures
• cabd665 Merge pull request #432 from willkg/431-charencoding
• cb156cb Fix parsing "meta" tag with encoding attribute
• 93a060e Merge pull request #429 from willkg/422-amp
• 8d7fd48 Convert & to & as a Characters token
• Additional commits viewable in compare view

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This change is 

[dependabot-preview]

Superseded by #193.