PT-2019-20148 · Python · Typed Ast

Published 2019-11-26 · Updated 2019-11-26

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions typed ast versions 1.3.0 through 1.3.1

Description The issue is related to an out-of-bounds read in the ast for arguments function. An attacker who can cause a Python interpreter to parse Python source code, but not necessarily execute it, may be able to crash the interpreter process. This could be a concern in services that parse Python code without executing it, such as web-based services.

Recommendations For typed ast versions 1.3.0 through 1.3.1, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

PYSEC-2019-61

Affected Products

Typed Ast

References · 7

• https://osv.dev/vulnerability/PYSEC-2019-61 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/LG5H4Q6LFVRX7SFXLBEJMNQFI4T5SCEA · Vendor Advisory
• https://github.com/python/cpython/commit/a4d78362397fc3bced6ea80fbc7b5f4827aec55e · Note
• https://github.com/python/cpython/commit/dcfcd146f8e6fc5c2fc16a4c192a0c5f5ca8c53c · Note
• https://github.com/python/typed_ast/commit/156afcb26c198e162504a57caddfe0acd9ed7dce · Note
• https://github.com/python/typed_ast/commit/dc317ac9cff859aa84eeabe03fb5004982545b3b · Note
• https://bugs.python.org/issue36495 · Note