Bug 1810593 (CVE-2019-19274)

Summary:	CVE-2019-19274 python3-typed_ast: out-of-bounds read in handle_keywordonly_args() function
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	gwync, philip.wyett
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 05:24:42 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1810594
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2020-03-05 14:45:51 UTC

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.)

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

Upstream commits:
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

Comment 1 Guilherme de Almeida Suckevicz 2020-03-05 14:47:07 UTC

Created python3-typed_ast tracking bugs for this issue:

Affects: fedora-30 [bug 1810594]