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move_elements can double-free objects on panic

Critical severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jun 13, 2023

Package

cargo scratchpad (Rust)

Affected versions

< 1.3.1

Patched versions

1.3.1

Description

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.

References

Published by the National Vulnerability Database Mar 5, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jun 17, 2022
Last updated Jun 13, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.222%
(61st percentile)

Weaknesses

CVE ID

CVE-2021-28031

GHSA ID

GHSA-3qm2-rfqw-fmrw

Source code

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