RUSTSEC-2020-0060

futures_task::waker may cause a use-after-free if used on a type that isn't 'static

Reported

September 4, 2020

Issued

October 31, 2020 (last modified: October 19, 2021)

Package

futures-task (crates.io)

Type

Vulnerability

Categories

Keywords

#use-after-free #arbitrary-code-execution #memory-corruption #memory-management

Aliases

CVE-2020-35906

Details

https://github.com/rust-lang/futures-rs/pull/2206

CVSS Score

7.8 HIGH

CVSS Details

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

CVSS Vector

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

Patched

>=0.3.6

Unaffected

<=0.2.1

Affected Functions

Version

futures_task::waker

>=0.3.0

Description

Affected versions of the crate did not properly implement a 'static lifetime bound on the waker function. This resulted in a use-after-free if Waker::wake() is called after original data had been dropped.

The flaw was corrected by adding 'static lifetime bound to the data waker takes.