Vulnerability CVE-2019-19275


Published: 2019-11-26   Modified: 2019-11-29

Description:
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.)

Type:

CWE-125

(Out-of-bounds Read)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Python -> Typed ast 

 References:
https://bugs.python.org/issue36495
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

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