CVE-2021-3907 : Vulnerability Insights and Analysis
Learn about CVE-2021-3907 involving arbitrary filepath traversal via URI injection in OctoRPKI by Cloudflare, its impact, and mitigation steps to secure your systems.
A detailed overview of CVE-2021-3907, including its impact, technical details, and mitigation strategies.
Understanding CVE-2021-3907
In this section, we will delve into the specifics of CVE-2021-3907.
What is CVE-2021-3907?
CVE-2021-3907 involves arbitrary filepath traversal via URI injection in OctoRPKI, a product by Cloudflare. It enables remote code execution by allowing the creation of files outside the intended cache folder through a specific file path manipulation.
The Impact of CVE-2021-3907
The vulnerability poses a high risk, with a CVSS base score of 7.4. It could lead to a potential remote code execution on the host machine where OctoRPKI is deployed.
Technical Details of CVE-2021-3907
Let's explore the technical aspects of CVE-2021-3907.
Vulnerability Description
OctoRPKI fails to properly escape a URI-containing malicious filename, leading to unauthorized file creation in unsecured directory locations. This flaw can be exploited to execute arbitrary remote code.
Affected Systems and Versions
The vulnerability affects Cloudflare's OctoRPKI versions less than 1.4.3, making systems running on these versions susceptible to the attack.
Exploitation Mechanism
The exploit involves injecting a malicious URI with a crafted file path that includes parent directory traversal characters, enabling the creation of files outside the intended storage location.
Mitigation and Prevention
Discover the steps to mitigate and prevent vulnerabilities like CVE-2021-3907.
Immediate Steps to Take
Users are advised to upgrade their OctoRPKI installations to version 1.4.3 to patch the vulnerability and prevent potential exploitation.
Long-Term Security Practices
Implement secure coding practices, input validation mechanisms, and regular security audits to minimize the risks of arbitrary filepath traversal vulnerabilities.
Patching and Updates
Stay proactive in applying security patches and updates to ensure your systems are protected from known vulnerabilities.