[3.8] bpo-39040: Fix parsing of email mime headers with whitespace between encoded-words. (gh-17620) #20505
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…encoded-words. (pythongh-17620) * bpo-39040: Fix parsing of email headers with encoded-words inside a quoted string. It is fairly common to find malformed mime headers (especially content-disposition headers) where the parameter values, instead of being encoded to RFC standards, are "encoded" by doing RFC 2047 "encoded word" encoding, and then enclosing the whole thing in quotes. The processing of these malformed headers was incorrectly leaving the spaces between encoded words in the decoded text (whitespace between adjacent encoded words is supposed to be stripped on decoding). This changeset fixes the encoded word processing inside quoted strings (bare-quoted-string) to do correct RFC 2047 decoding by stripping that whitespace. (cherry picked from commit 21017ed) Co-authored-by: Abhilash Raj <maxking@users.noreply.github.com>
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@maxking and @bitdancer: Status check is done, and it's a success ✅ . |
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@maxking and @bitdancer: Status check is done, and it's a success ✅ . |
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@maxking and @bitdancer: Status check is done, and it's a success ✅ . |
csabella
approved these changes
May 29, 2020
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It is fairly common to find malformed mime headers (especially content-disposition
headers) where the parameter values, instead of being encoded to RFC
standards, are "encoded" by doing RFC 2047 "encoded word" encoding, and
then enclosing the whole thing in quotes. The processing of these malformed
headers was incorrectly leaving the spaces between encoded words in the decoded
text (whitespace between adjacent encoded words is supposed to be stripped on
decoding). This changeset fixes the encoded word processing inside quoted strings
(bare-quoted-string) to do correct RFC 2047 decoding by stripping that
whitespace.
(cherry picked from commit 21017ed)
Co-authored-by: Abhilash Raj maxking@users.noreply.github.com
https://bugs.python.org/issue39040