CVE-2021-26954 : Exploit Details and Defense Strategies

An issue was discovered in the qwutils crate before 0.3.1 for Rust where insert_slice_clone can perform a double drop when a Clone panic occurs.

Understanding CVE-2021-26954

This CVE describes a vulnerability found in the qwutils crate of Rust programming language.

What is CVE-2021-26954?

CVE-2021-26954 is a vulnerability in the qwutils crate of Rust, allowing insert_slice_clone to perform a double drop in case of a Clone panic.

The Impact of CVE-2021-26954

This vulnerability could potentially lead to memory corruption or other unexpected behavior in Rust applications.

Technical Details of CVE-2021-26954

The technical details of this CVE include:

Vulnerability Description

The issue arises in the qwutils crate before version 0.3.1 for Rust, where a double drop can occur during a Clone panic.

Affected Systems and Versions

All versions of the qwutils crate before 0.3.1 for Rust are affected by this vulnerability.

Exploitation Mechanism

Exploitation of this vulnerability involves triggering a Clone panic, leading to the double drop in insert_slice_clone.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-26954, consider the following:

Immediate Steps to Take

Developers should update to qwutils crate version 0.3.1 or newer to eliminate the vulnerability.

Long-Term Security Practices

Adopt secure coding practices to prevent panic scenarios and double drops in Rust applications.

Patching and Updates

Regularly check for updates and patches for the qwutils crate to ensure the latest security fixes are in place.