CVE-2023-0821 Explained : Impact and Mitigation
Learn about CVE-2023-0821 vulnerability affecting HashiCorp Nomad Client with decompression bombs in artifact block. Find out impact, affected versions, and steps to mitigate the risk.
This CVE-2023-0821 focuses on a vulnerability in HashiCorp's Nomad Client regarding decompression bombs in the artifact block, potentially leading to data amplification.
Understanding CVE-2023-0821
This section provides an overview of the CVE-2023-0821 vulnerability impacting HashiCorp's Nomad Client.
What is CVE-2023-0821?
CVE-2023-0821 highlights an issue in Nomad Client where the handling of highly compressed data can result in decompression bombs within the artifact block. This vulnerability, categorized as CWE-409, can cause artificially inflated file sizes (CAPEC-572).
The Impact of CVE-2023-0821
The impact of CVE-2023-0821 can lead to excessive disk usage when jobs using a maliciously compressed artifact stanza source are executed in HashiCorp Nomad and Nomad Enterprise versions 1.2.15 up to 1.3.8, and 1.4.3. This could potentially disrupt system availability.
Technical Details of CVE-2023-0821
Delve deeper into the technical aspects of CVE-2023-0821 to understand the vulnerability better.
Vulnerability Description
The vulnerability arises due to improper handling of highly compressed data, resulting in decompression bombs within the artifact block of Nomad Client.
Affected Systems and Versions
HashiCorp's Nomad and Nomad Enterprise versions 1.2.15 up to 1.3.8, and 1.4.3 are affected by this vulnerability on various platforms such as 64-bit, 32-bit, x86, ARM, MacOS, Windows, and Linux.
Exploitation Mechanism
Attackers could exploit this vulnerability by crafting jobs with maliciously compressed artifact stanza sources, leading to excessive disk usage and potential denial of service.
Mitigation and Prevention
Discover how to mitigate and prevent the CVE-2023-0821 vulnerability in HashiCorp's Nomad Client.
Immediate Steps to Take
Users are advised to update their Nomad and Nomad Enterprise installations to versions 1.2.16, 1.3.9, or 1.4.4 to mitigate the risk of decompression bomb attacks.
Long-Term Security Practices
Implementing secure coding practices, monitoring disk usage, and validating input data can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly monitoring for security updates from HashiCorp and promptly applying patches to address known vulnerabilities is crucial to maintaining system integrity.