CVE-2019-19275

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.)

How to fix CVE-2019-19275

To remediate CVE-2019-19275, upgrade the affected package to a fixed version below.

• —upgrade to 1.4.0-1 or later
• —upgrade to 1.3.2 or later
• —upgrade to 156afcb26c198e162504a57caddfe0acd9ed7dce or later

Is CVE-2019-19275 being exploited?

Low — EPSS is 1.4%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• from 0, < 1.4.0-1
• >= 1.3.0, < 1.3.2
• from 0, < 156afcb26c198e162504a57caddfe0acd9ed7dce, < dc317ac9cff859aa84eeabe03fb5004982545b3b | from 0, < dcfcd146f8e6fc5c2fc16a4c192a0c5f5ca8c53c, < a4d78362397fc3bced6ea80fbc7b5f4827aec55e | from 0, < 1.3.2

CVSS scores

References (12)

• ADVISORYgithub.com/advisories/GHSA-7xxv-wpxj-mx5v
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2019-19275
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-19275
• PATCHgithub.com/python/typed_ast
• WEBbugs.python.org