RUSTSEC-2020-0048

Use-after-free in BodyStream due to lack of pinning

Reported

January 24, 2020

Issued

October 2, 2020 (last modified: October 19, 2021)

Package

actix-http (crates.io)

Type

Vulnerability

Categories

memory-corruption

Aliases

CVE-2020-35901

Details

https://github.com/actix/actix-web/issues/1321

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

>=2.0.0-alpha.1

Description

Affected versions of this crate did not require the buffer wrapped in BodyStream to be pinned, but treated it as if it had a fixed location in memory. This may result in a use-after-free.

The flaw was corrected by making the trait MessageBody require Unpin and making poll_next() function accept Pin<&mut Self> instead of &mut self.