CVE-2020-25576 – rand_core

Package

Manager: cargo
Name: rand_core
Vulnerable Version: >=0.4.0 <0.4.2 || >=0 <0.3.1

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00544 pctl0.66787

Details

Unaligned memory access in rand_core ### Impact Affected versions of this crate violated alignment when casting byte slices to integer slices, resulting in undefined behavior. `rand_core::BlockRng::next_u64` and `rand_core::BlockRng::fill_bytes` are affected. ### Patches The flaw was corrected by Ralf Jung and Diggory Hardy for `rand_core >= 0.4.2`. ### Workarounds None. ### References See [Rand's changelog](https://github.com/rust-random/rand/blob/master/rand_core/CHANGELOG.md#050---2019-06-06). ### For more information If you have any questions or comments about this advisory, [open an issue in the Rand repository](https://github.com/rust-random/rand/issues/new/choose).

Metadata

Created: 2021-08-25T20:56:50Z
Modified: 2021-08-18T20:45:24Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/08/GHSA-mmc9-pwm7-qj5w/GHSA-mmc9-pwm7-qj5w.json
CWE IDs: ["CWE-704"]
Alternative ID: GHSA-mmc9-pwm7-qj5w
Finding: F113
Auto approve: 1