Loading...
Skip to main content
GeekWala

CVE-2020-25576 — Unaligned memory access in rand_core — CVE Details

CRITICAL

Unaligned memory access in rand_core

Published August 25, 2021Updated November 8, 2023Source: osv

Summary

### 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).

Advisory Timeline

  • First published August 25, 2021 (1874 days ago).
  • Last revised November 8, 2023 — 804 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update rand_core to 0.3.1 or later
cargo update -p rand_core --precise 0.3.1
Cargo
Update rand_core to 0.4.2 or later
cargo update -p rand_core --precise 0.4.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
rand_core
crates.io
All versions0.3.1
rand_core
crates.io
All versions0.4.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2020-25576?
Unaligned memory access in rand_core This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2020-25576?
CVE-2020-25576 affects rand_core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-25576 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-mmc9-pwm7-qj5w
RUSTSEC-2019-0035

Related CVEs

More crates.io advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies