CVE-2021-29929 : Exploit Details and Defense Strategies

An issue was discovered in the endian_trait crate through 2021-01-04 for Rust, where a double drop can occur when a user-provided Endian implementation panics.

Understanding CVE-2021-29929

This CVE affects the endian_trait crate in Rust, leading to double drops under specific conditions.

What is CVE-2021-29929?

CVE-2021-29929 is a vulnerability found in the endian_trait crate in Rust, potentially causing a double drop in certain scenarios when a user-provided Endian implementation panics.

The Impact of CVE-2021-29929

If exploited, this vulnerability could result in unexpected behavior, crashes, or potentially even remote code execution in Rust applications utilizing the affected crate.

Technical Details of CVE-2021-29929

This section covers the specific technical aspects of the CVE.

Vulnerability Description

The issue arises due to a double drop scenario occurring when a user-provided Endian implementation panics within the endian_trait crate through 2021-01-04 for Rust.

Affected Systems and Versions

The vulnerability impacts the endian_trait crate through 2021-01-04 for Rust.

Exploitation Mechanism

By triggering a panic in the user-provided Endian implementation, an attacker can exploit this vulnerability to cause a double drop.

Mitigation and Prevention

To address CVE-2021-29929, it is crucial to implement the following mitigation strategies.

Immediate Steps to Take

Developers should update the affected Rust applications to the patched versions of the endian_trait crate to prevent the occurrence of double drops.

Long-Term Security Practices

Ensure regular security assessments and code reviews to identify and mitigate vulnerabilities in Rust applications proactively.

Patching and Updates

Stay up-to-date with Rust security advisories and promptly apply patches or updates to address known vulnerabilities and enhance application security.