[Security] Bump httplib2 from 0.8 to 0.18.0 in /requirements

[dependabot-preview]

Bumps httplib2 from 0.8 to 0.18.0. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

CRLF injection in httplib2

Impact

Attacker controlling unescaped part of uri for httplib2.Http.request() could change request headers and body, send additional hidden requests to same server.

Impacts software that uses httplib2 with uri constructed by string concatenation, as opposed to proper urllib building with escaping.

Patches

Problem has been fixed in 0.18.0 Space, CR, LF characters are now quoted before any use. This solution should not impact any valid usage of httplib2 library, that is uri constructed by urllib.

Workarounds

Create URI with urllib.parse family functions: urlencode, urlunsplit.

user_input = " HTTP/1.1\r\ninjected: attack\r\nignore-http:"
-uri = "https://api.server/?q={}".format(user_input)
+uri = urllib.parse.urlunsplit(("https", "api.server", "/v1", urllib.parse.urlencode({"q": user_input}), ""))
http.request(uri)

... (truncated)

Affected versions: < 0.18.0

Changelog

Sourced from httplib2's changelog.

0.18.0

IMPORTANT security vulnerability CWE-93 CRLF injection Force %xx quote of space, CR, LF characters in uri. Special thanks to Recar https://github.com/Ciyfly for discrete notification. https://cwe.mitre.org/data/definitions/93.html

0.17.4

Ship test suite in source dist httplib2/httplib2#168

0.17.3

IronPython2.7: relative import iri2uri fixes ImportError httplib2/httplib2#163

0.17.2

python3 + debug + IPv6 disabled: https raised "IndexError: Replacement index 1 out of range for positional args tuple" httplib2/httplib2#161

0.17.1

python3: no_proxy was not checked with https httplib2/httplib2#160

0.17.0

feature: Http().redirect_codes set, works after follow(_all)_redirects check This allows one line workaround for old gcloud library that uses 308 response without redirect semantics. httplib2/httplib2#156

0.16.0

IMPORTANT cache invalidation change, fix 307 keep method, add 308 Redirects httplib2/httplib2#151

proxy: username/password as str compatible with pysocks httplib2/httplib2#154

0.15.0

python2: regression in connect() error handling httplib2/httplib2#150

add support for password protected certificate files httplib2/httplib2#143

... (truncated)

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[dependabot-preview]

Superseded by #38.