[3.9] bpo-43882 - urllib.parse should sanitize urls containing ASCII newline and tabs. (GH-25595) #25725
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…e and tabs. (pythonGH-25595) * issue43882 - urllib.parse should sanitize urls containing ASCII newline and tabs. Co-authored-by: Gregory P. Smith <[email protected]> Co-authored-by: Serhiy Storchaka <[email protected]> (cherry picked from commit 76cd81d) Co-authored-by: Senthil Kumaran <[email protected]>
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This goes to show that messing with security-critical code is a nasty
business and often a mistake. Luckily, we have tests, but what
happened here is that I tweaked the code to separate out checks from
redirection. In so doing, I removed pulled the quoting code into the
checks, but took it out of the redirection part. So previously, we'd
quote a URL before redirecting it, now we didn't.
To fix this, I copied the fix from Python's standard lib that you can
see here:
python/cpython#25725
Instead of quoting it, we just make sure it doesn't have newlines. If
it does, we bail.
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…newline and tabs. (pythonGH-25595) (pythonGH-25725) * bpo-43882 - urllib.parse should sanitize urls containing ASCII newline and tabs. (pythonGH-25595) Co-authored-by: Gregory P. Smith <[email protected]> Co-authored-by: Serhiy Storchaka <[email protected]> (cherry picked from commit 76cd81d) Co-authored-by: Senthil Kumaran <[email protected]> (backported to Python 2.7 by Michał Górny)
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Co-authored-by: Gregory P. Smith [email protected]
Co-authored-by: Serhiy Storchaka [email protected]
(cherry picked from commit 76cd81d)
Co-authored-by: Senthil Kumaran [email protected]
https://bugs.python.org/issue43882