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| author | Gregory P. Smith <gps@google.com> | 2022-09-02 16:35:08 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-09-02 16:35:08 (GMT) |
| commit | 511ca9452033ef95bc7d7fc404b8161068226002 (patch) | |
| tree | cefd49e0c9c75f912fa28d05eae15335273aaa8e /Doc/library/test.rst | |
| parent | 656167db81a53934da55d90ed431449d8a4fc14b (diff) | |
| download | cpython-511ca9452033ef95bc7d7fc404b8161068226002.zip cpython-511ca9452033ef95bc7d7fc404b8161068226002.tar.gz cpython-511ca9452033ef95bc7d7fc404b8161068226002.tar.bz2 | |
gh-95778: CVE-2020-10735: Prevent DoS by very large int() (#96499)
Integer to and from text conversions via CPython's bignum `int` type 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.
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).
<!-- gh-issue-number: gh-95778 -->
* Issue: gh-95778
<!-- /gh-issue-number -->
I wrote up [a one pager for the release managers](https://docs.google.com/document/d/1KjuF_aXlzPUxTK4BMgezGJ2Pn7uevfX7g0_mvgHlL7Y/edit#). Much of that text wound up in the Issue. Backports PRs already exist. See the issue for links.
Diffstat (limited to 'Doc/library/test.rst')
| -rw-r--r-- | Doc/library/test.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Doc/library/test.rst b/Doc/library/test.rst index f3bc7e7..eff3751 100644 --- a/Doc/library/test.rst +++ b/Doc/library/test.rst @@ -1011,6 +1011,16 @@ The :mod:`test.support` module defines the following functions: .. versionadded:: 3.10 +.. function:: adjust_int_max_str_digits(max_digits) + + This function returns a context manager that will change the global + :func:`sys.set_int_max_str_digits` setting for the duration of the + context to allow execution of test code that needs a different limit + on the number of digits when converting between an integer and string. + + .. versionadded:: 3.12 + + The :mod:`test.support` module defines the following classes: |