CVE-2021-29941 Explained : Impact and Mitigation
Learn about CVE-2021-29941, a vulnerability in the Rust reorder crate allowing out-of-bounds write, impacting specific versions. Find mitigation steps and recommended security practices.
An issue was discovered in the reorder crate through 2021-02-24 for Rust, where swap_index has an out-of-bounds write if an iterator returns a len() that is too small.
Understanding CVE-2021-29941
This CVE identifies a vulnerability in the reorder crate for Rust, affecting certain versions.
What is CVE-2021-29941?
CVE-2021-29941 is a security flaw in the swap_index function of the reorder crate in Rust, leading to an out-of-bounds write under specific conditions.
The Impact of CVE-2021-29941
Exploitation of this vulnerability could result in a denial of service (DoS) attack or potential execution of arbitrary code by an attacker.
Technical Details of CVE-2021-29941
The following technical details outline the specifics of the vulnerability:
Vulnerability Description
The issue arises due to an out-of-bounds write in the swap_index function when an iterator returns a length value that is insufficient.
Affected Systems and Versions
The vulnerability affects specific versions of the reorder crate in Rust through 2021-02-24.
Exploitation Mechanism
An attacker can exploit this vulnerability by triggering the swap_index function with a too-small length returned by an iterator.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-29941, follow these guidelines:
Immediate Steps to Take
Developers are advised to update the affected Rust packages to versions that contain patches addressing this issue.
Long-Term Security Practices
Implement secure coding practices and conduct regular security audits to identify and address similar vulnerabilities proactively.
Patching and Updates
Stay informed about security updates for Rust packages and promptly apply patches to ensure the system's security integrity.