CVE-2024-12254: Unbounded memory buffering in SelectorSocketTransport.writelines()
First published: Fri Dec 06 2024(Updated: )
Last updated 20 January 2025
Credit: cna@python.org cna@python.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/python3.11 | 3.11.2-6+deb12u5 3.11.2-6+deb12u3 | |
| debian/python3.12 | 3.12.8-5 | |
| debian/python3.13 | 3.13.1-3 | |
| debian/python3.9 | 3.9.2-1 3.9.2-1+deb11u2 | |
| Python Babel Localedata | >=3.12.0 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2024:10978
- https://access.redhat.com/errata/RHSA-2024:10980
- https://access.redhat.com/errata/RHSA-2024:11035
- https://bugzilla.redhat.com/show_bug.cgi?id=2330804
- https://github.com/python/cpython/issues/127655
- https://github.com/python/cpython/pull/127656
- https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/
- https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82
- https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5
- https://security-tracker.debian.org/tracker/CVE-2024-12254
- http://www.openwall.com/lists/oss-security/2024/12/06/1
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-12254
- https://nvd.nist.gov/vuln/detail/CVE-2024-12254
- https://launchpad.net/bugs/cve/CVE-2024-12254
- https://ubuntu.com/security/CVE-2024-12254
- https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786
Frequently Asked Questions
What is the severity of CVE-2024-12254?
CVE-2024-12254 is classified with a medium severity due to potential performance issues in asynchronous socket communication.
How do I fix CVE-2024-12254?
To fix CVE-2024-12254, update Python to version 3.12.8-5 or the necessary patched version as specified for your distribution.
Which versions of Python are affected by CVE-2024-12254?
CVE-2024-12254 affects Python versions starting from 3.12.0 onward.
Is there a workaround for CVE-2024-12254?
Currently, there are no documented workarounds for CVE-2024-12254; upgrading to a patched version is recommended.
What components are impacted by CVE-2024-12254?
CVE-2024-12254 primarily affects the asyncio._SelectorSocketTransport.writelines() method in Python's asynchronous I/O framework.
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