RUSTSEC-2020-0145

Use-after-free when cloning a partially consumed Vec iterator

Reported

November 2, 2020

Issued

February 27, 2021 (last modified: October 19, 2021)

Package

heapless (crates.io)

Type

INFO Unsound

Categories

memory-corruption
memory-exposure

Keywords

#use-after-free

Aliases

CVE-2020-36464

Details

https://github.com/japaric/heapless/issues/181

CVSS Score

7.5 HIGH

CVSS Details

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

CVSS Vector

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

Patched

>=0.6.1

Affected Functions

Version

heapless::vec::IntoIter::clone

<=0.6

Description

The IntoIter Clone implementation clones the whole underlying Vec. If the iterator is partially consumed the consumed items will be copied, thus creating a use-after-free access.

A proof of concept is available in the original bug report.