[3.10] gh-95778: CVE-2020-10735: Prevent DoS by very large int()#96501
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Co-authored-by: Christian Heimes <christian@python.org>
Ned pointed this out on the 3.7 review, it matches other patch changes and stands out better.
gpshead requested review from lysnikolaou, pablogsal, rhettinger and terryjreedy as code owners
tiran added the 🔨 test-with-buildbots 
bedevere-bot commented Sep 2, 2022
bedevere-bot removed the 🔨 test-with-buildbots MemberAuthor
gpshead commented Sep 4, 2022
bugfix incoming #96537 |
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Integer to and from text conversions via CPython's bignum
inttype is not safe against denial of service attacks due to malicious input. Very large input strings with hundred thousands of digits can consume several CPU seconds.This PR comes fresh from a pile of work done in our private PSRT security response team repo.
This backports #96499 aka 511ca94
Signed-off-by: Christian Heimes [Red Hat] christian@python.org
Tons-of-polishing-up-by: Gregory P. Smith [Google] greg@krypto.org
Reviews via the private PSRT repo via many others (see the NEWS entry in the PR).
I wrote up a one pager for the release managers.