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[3.9] gh-119511: Fix a potential denial of service in imaplib (GH-119514)#130248
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…ythonGH-119514)The IMAP4 client could consume an arbitrary amount of memory when tryingto connect to a malicious server, because it read a "literal" data with asingle read(size) call, and BufferedReader.read() allocates the bytesobject of the specified size before reading. Now the IMAP4 client reads databy chunks, therefore the amount of used memory is limited by theamount of the data actually been sent by the server.(cherry picked from commit735f25c)Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>Co-authored-by: Gregory P. Smith <greg@krypto.org>
f116a9c intopython:3.9 14 checks passed
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gentoo-bot pushed a commit to gentoo/cpython that referenced this pull requestApr 9, 2025
…ythonGH-119514) (python#130248)The IMAP4 client could consume an arbitrary amount of memory when tryingto connect to a malicious server, because it read a "literal" data with asingle read(size) call, and BufferedReader.read() allocates the bytesobject of the specified size before reading. Now the IMAP4 client reads databy chunks, therefore the amount of used memory is limited by theamount of the data actually been sent by the server.(cherry picked from commit735f25c)Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>Co-authored-by: Gregory P. Smith <greg@krypto.org>
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(cherry picked from commit735f25c)