CVE-2023-36632: python Uncontrolled Recursion

Vulnerability summary

CVE-2023-36632 is a high (CVSS 7.5) Uncontrolled Recursion vulnerability in python. EPSS estimates a 1.58% chance of exploitation in the next 30 days, higher than 75.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 25-06-2023
   PublishedVulnerability first disclosed.
2. 27-11-2024
   Last modifiedVulnerability information updated.

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.

• CWE-674Uncontrolled RecursionThe product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.