CVE-2023-36632:
Description
The legacy email.utils.parseaddr function in Python through 3.11.4 allows attackers to trigger "RecursionError: maximum recursion depth exceeded while calling a Python object" via a crafted argument. This argument is plausibly an untrusted value from an application's input data that was supposed to contain a name and an e-mail address. NOTE: email.utils.parseaddr is categorized as a Legacy API in the documentation of the Python email package. Applications should instead use the email.parser.BytesParser or email.parser.Parser class. NOTE: the vendor's perspective is that this is neither a vulnerability nor a bug. The email package is intended to have size limits and to throw an exception when limits are exceeded; they were exceeded by the example demonstration code.
Classification
CVE ID: CVE-2023-36632
CVSS Base Severity: LOW
CVSS Base Score: 0.0
Affected Products
Vendor: n/a
Product: n/a
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.19% (probability of being exploited)
EPSS Percentile: 56.5% (scored less or equal to compared to others)
EPSS Date: 2025-02-03 (when was this score calculated)
References
https://docs.python.org/3/library/email.utils.htmlhttps://docs.python.org/3/library/email.html
https://github.com/Daybreak2019/PoC_python3.9_Vul/blob/main/RecursionError-email.utils.parseaddr.py
https://github.com/python/cpython/issues/103800