CVE-2021-28034 : Exploit Details and Defense Strategies

An issue was discovered in the stack_dst crate before version 0.6.1 for Rust, where a double free can occur upon a val.clone() panic.

Understanding CVE-2021-28034

This CVE pertains to a vulnerability found in the stack_dst crate in Rust programming language.

What is CVE-2021-28034?

CVE-2021-28034 is a vulnerability identified in the stack_dst crate before version 0.6.1 for Rust. This issue arises due to the push_inner behavior associated with a double free scenario during a val.clone() panic.

The Impact of CVE-2021-28034

The impact of this vulnerability can lead to a double free scenario, which could potentially be exploited by attackers to execute arbitrary code or trigger a denial of service (DoS) condition.

Technical Details of CVE-2021-28034

This section provides more insights into the vulnerability's technical aspects.

Vulnerability Description

The vulnerability in the stack_dst crate allows for a double free situation to occur when encountering a val.clone() panic, potentially leading to exploitable scenarios.

Affected Systems and Versions

The affected systems include instances running versions of the stack_dst crate prior to version 0.6.1 for the Rust programming language.

Exploitation Mechanism

The exploitation of this vulnerability requires triggering a val.clone() panic, leading to a double free scenario that can be utilized by threat actors.

Mitigation and Prevention

By following the suggestions in this section, users can take immediate and long-term measures to secure their systems against CVE-2021-28034.

Immediate Steps to Take

Users are advised to update the stack_dst crate to version 0.6.1 or later to mitigate the risk of encountering the double free vulnerability.

Long-Term Security Practices

It is recommended to stay updated on security advisories and apply patches promptly to prevent potential exploitation of vulnerabilities in software components.

Patching and Updates

Regularly monitoring for updates and applying patches released by the software vendor can help in maintaining a secure software environment.