CVE-2023-36632
First published: Sun Jun 25 2023(Updated: )
** DISPUTED ** 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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Python Python | <=3.11.4 | |
| IBM QRadar Network Packet Capture | <=7.5.0 - 7.5.0 Update Package 7 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://docs.python.org/3/library/email.html
- https://docs.python.org/3/library/email.utils.html
- https://github.com/Daybreak2019/PoC_python3.9_Vul/blob/main/RecursionError-email.utils.parseaddr.py
- https://github.com/python/cpython/issues/103800
- https://exchange.xforce.ibmcloud.com/vulnerabilities/258920
- https://www.ibm.com/support/pages/node/7160961 (Advisory)
Frequently Asked Questions
What is CVE-2023-36632?
CVE-2023-36632 is a vulnerability in the legacy email.utils.parseaddr function in Python through 3.11.4 that allows attackers to trigger a "RecursionError: maximum recursion depth exceeded while calling a Python object" by providing a crafted argument.
What is the severity of CVE-2023-36632?
CVE-2023-36632 has a severity rating of 7.5 (high).
Which version of Python is affected by CVE-2023-36632?
Python versions up to and including 3.11.4 are affected by CVE-2023-36632.
How can attackers exploit CVE-2023-36632?
Attackers can exploit CVE-2023-36632 by providing a crafted argument to the email.utils.parseaddr function.
Are there any public references for CVE-2023-36632?
Yes, you can find more information about CVE-2023-36632 in the Python documentation (https://docs.python.org/3/library/email.html, https://docs.python.org/3/library/email.utils.html) and a PoC on GitHub (https://github.com/Daybreak2019/PoC_python3.9_Vul/blob/main/RecursionError-email.utils.parseaddr.py).
- collector/nvd-index
- agent/type
- agent/author
- agent/weakness
- agent/status
- agent/event
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/ibm-support
- source/IBM
- agent/references
- agent/severity
- agent/tags
- agent/description
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/trending
- status/disputed
- vendor/python
- canonical/python python
- version/python python/3.11.4
- vendor/ibm
- canonical/ibm qradar network packet capture
- version/ibm qradar network packet capture/7.5.0 - 7.5.0 update package 7