Reported

November 28, 2020

Issued

November 28, 2020 (last modified: October 19, 2021)

Package

pyo3 (crates.io)

Type

Vulnerability

Keywords

#memory-corruption

Aliases

• CVE-2020-35917

Details

https://github.com/PyO3/pyo3/pull/1297

CVSS Score

5.5 MEDIUM

CVSS Details

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Patched

• >=0.12.4

Unaffected

• <0.12.0

Description

A bug in From<Py<T>> would lead to an extra reference count decrement, often leading to use-after-free issues.