CVE-2021-32649 : Exploit Details and Defense Strategies
Discover the details of CVE-2021-32649, an authenticated file write vulnerability in October CMS allowing remote code execution. Learn the impact, affected systems, and mitigation steps.
This article provides an overview of CVE-2021-32649, detailing the vulnerability found in October CMS that could lead to remote code execution.
Understanding CVE-2021-32649
This section delves into the specifics of the CVE-2021-32649 vulnerability in the October CMS system.
What is CVE-2021-32649?
CVE-2021-32649 highlights an authenticated file write vulnerability in October CMS, allowing an attacker with specific privileges to execute PHP code through crafted Twig code.
The Impact of CVE-2021-32649
The impact of this vulnerability is rated as high, with a base severity score of 8.8 on the CVSS scale. It could lead to remote code execution and compromise the confidentiality, integrity, and availability of the affected system.
Technical Details of CVE-2021-32649
This section provides technical insights into CVE-2021-32649, covering vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability arises from improper neutralization of special elements in output used by a downstream component, leading to injection attacks.
Affected Systems and Versions
October CMS versions prior to 1.0.473 and 1.1.6 are affected by this vulnerability, impacting users with specific backend privileges.
Exploitation Mechanism
Attackers can exploit the vulnerability by running specially crafted Twig code in the template markup, enabling the execution of PHP code.
Mitigation and Prevention
In this section, we discuss the steps to mitigate the risks posed by CVE-2021-32649 and prevent potential exploitation.
Immediate Steps to Take
Users are advised to update their October CMS installations to at least Build 473 (v1.0.473) or v1.1.6 to patch the vulnerability. Alternatively, applying the available patch manually can serve as a temporary workaround.
Long-Term Security Practices
To enhance security posture, practicing the principle of least privilege, regular security audits, and staying informed about security updates are recommended.
Patching and Updates
Staying updated with the latest security patches released by October CMS is crucial in preventing exploitation of known vulnerabilities.