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CVE-2024-6923: Email header injection due to unquoted newlines

Description

There is a MEDIUM severity vulnerability affecting CPython.

The
email module didn’t properly quote newlines for email headers when
serializing an email message allowing for header injection when an email
is serialized.

Classification

CVE ID: CVE-2024-6923

Affected Products

Vendor: Python Software Foundation

Product: CPython

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 15.23% (scored less or equal to compared to others)

EPSS Date: 2025-02-09 (when was this score calculated)

References

https://github.com/python/cpython/pull/122233
https://github.com/python/cpython/issues/121650
https://mail.python.org/archives/list/[email protected]/thread/QH3BUOE2DYQBWP7NAQ7UNHPPOELKISRW/
https://github.com/python/cpython/commit/4766d1200fdf8b6728137aa2927a297e224d5fa7
https://github.com/python/cpython/commit/4aaa4259b5a6e664b7316a4d60bdec7ee0f124d0
https://github.com/python/cpython/commit/06f28dc236708f72871c64d4bc4b4ea144c50147
https://github.com/python/cpython/commit/b158a76ce094897c870fb6b3de62887b7ccc33f1
https://github.com/python/cpython/commit/f7be505d137a22528cb0fc004422c0081d5d90e6
https://github.com/python/cpython/commit/f7c0f09e69e950cf3c5ada9dbde93898eb975533

Timeline