Reported

April 19, 2019

Issued

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

Package

rand_core (crates.io)

Type

INFO Unsound

Aliases

• GHSA-mmc9-pwm7-qj5w
• CVE-2020-25576

Details

https://github.com/rust-random/rand/blob/master/rand_core/CHANGELOG.md#050---2019-06-06

CVSS Score

9.8 CRITICAL

CVSS Details

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS Vector

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

Patched

• ^0.3.1
• >=0.4.2

Affected Functions

Version

rand_core::BlockRng::fill_bytes

• <0.4.2

rand_core::BlockRng::next_u64

• <0.4.2

Description

Affected versions of this crate violated alignment when casting byte slices to integer slices, resulting in undefined behavior.

The flaw was corrected by Ralf Jung and Diggory Hardy.