CVE-2021-28031 — Vulnerability in scratchpad — CVE Details

CRITICAL

move_elements can double-free objects on panic

Published May 24, 2022Updated November 8, 2023Source: osv

Summary

Affected versions of scratchpad used ptr::read to read elements while calling a user provided function f on them. Since the pointer read duplicates ownership, a panic inside the user provided f function could cause a double free when unwinding. The flaw was fixed in commit `891561bea` by removing the unsafe block and using a plain iterator.

Advisory Timeline

First published May 24, 2022 (1602 days ago).
Last revised November 8, 2023 — 532 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo

Update scratchpad to 1.3.1 or later

cargo update -p scratchpad --precise 1.3.1

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

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

Package	Ecosystem	Affected	Fixed In
scratchpad	crates.io	All versions	1.3.1

Vulnerability Classification

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

CWE-415
View on MITRE

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-2021-28031?: move_elements can double-free objects on panic 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-2021-28031?: CVE-2021-28031 affects scratchpad. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-28031 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-3qm2-rfqw-fmrw

RUSTSEC-2021-0030

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