CVE-2019-19274
First published: Tue Nov 26 2019(Updated: )
typed_ast 1.3.0 and 1.3.1 has a handle_keywordonly_args out-of-bounds read. An attacker with the ability to cause a Python interpreter to parse Python source (but not necessarily execute it) may be able to crash the interpreter process. This could be a concern, for example, in a web-based service that parses (but does not execute) Python code. (This issue also affected certain Python 3.8.0-alpha prereleases.)
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Python Typed Ast | =1.3.0 | |
| Python Typed Ast | =1.3.1 | |
| pip/typed-ast | >=1.3.0<1.3.2 | 1.3.2 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2019-19274
- https://github.com/python/cpython/commit/a4d78362397fc3bced6ea80fbc7b5f4827aec55e
- https://github.com/python/cpython/commit/dcfcd146f8e6fc5c2fc16a4c192a0c5f5ca8c53c
- https://github.com/python/typed_ast/commit/156afcb26c198e162504a57caddfe0acd9ed7dce
- https://github.com/python/typed_ast/commit/dc317ac9cff859aa84eeabe03fb5004982545b3b
- https://bugs.python.org/issue36495
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LG5H4Q6LFVRX7SFXLBEJMNQFI4T5SCEA/
- https://github.com/advisories/GHSA-m3jw-62m7-jjcm (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LG5H4Q6LFVRX7SFXLBEJMNQFI4T5SCEA/
- https://github.com/pypa/advisory-database/tree/main/vulns/typed-ast/PYSEC-2019-130.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LG5H4Q6LFVRX7SFXLBEJMNQFI4T5SCEA
Frequently Asked Questions
What is the severity of CVE-2019-19274?
CVE-2019-19274 has a moderate severity level due to the potential for crashing the Python interpreter.
How do I fix CVE-2019-19274?
To fix CVE-2019-19274, upgrade typed-ast to version 1.3.2 or later.
What software is affected by CVE-2019-19274?
CVE-2019-19274 affects typed_ast versions 1.3.0 and 1.3.1.
What type of vulnerability is CVE-2019-19274?
CVE-2019-19274 is an out-of-bounds read vulnerability caused by incorrect handling of keyword-only arguments.
Who can exploit CVE-2019-19274?
An attacker with the ability to send Python source code to the interpreter can exploit CVE-2019-19274.
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