typed_ast 1.3.0 and 1.3.1 has an ast_for_arguments 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.)
The product reads data past the end, or before the beginning, of the intended buffer.
| Link | Tags |
|---|---|
| https://github.com/python/typed_ast/commit/156afcb26c198e162504a57caddfe0acd9ed7dce | third party advisory patch |
| https://github.com/python/cpython/commit/dcfcd146f8e6fc5c2fc16a4c192a0c5f5ca8c53c | third party advisory patch |
| https://github.com/python/cpython/commit/a4d78362397fc3bced6ea80fbc7b5f4827aec55e | third party advisory patch |
| https://github.com/python/typed_ast/commit/dc317ac9cff859aa84eeabe03fb5004982545b3b | third party advisory patch |
| https://bugs.python.org/issue36495 | patch vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LG5H4Q6LFVRX7SFXLBEJMNQFI4T5SCEA/ | vendor advisory |