CVE-2024-37423 in Newspack Blocks Plugin
Summary
by MITRE • 11/01/2024
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Automattic Newspack Blocks allows Path Traversal.This issue affects Newspack Blocks: from n/a through 3.0.8.
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Analysis
by VulDB Data Team • 11/01/2024
The vulnerability identified as CVE-2024-37423 represents a critical path traversal flaw within the Automattic Newspack Blocks plugin, specifically impacting versions ranging from an unspecified starting point through 3.0.8. This weakness enables malicious actors to bypass intended directory restrictions and access files outside the designated web root or restricted directories. The vulnerability stems from inadequate input validation and sanitization of file path parameters, allowing attackers to manipulate file system access through specially crafted requests that exploit improper limitation of pathname components.
This path traversal vulnerability operates at the core of file system interaction within the Newspack Blocks plugin, where user-supplied data is directly incorporated into file path constructions without proper validation or sanitization measures. The flaw creates an opportunity for attackers to navigate beyond intended directories and potentially access sensitive system files, configuration data, or other resources that should remain protected. The vulnerability manifests when the plugin processes file operations that involve user-provided path information, failing to properly restrict or validate the input before using it in file system calls.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can potentially enable attackers to execute arbitrary code, escalate privileges, or gain complete system compromise depending on the underlying system configuration and file permissions. Attackers could leverage this weakness to read sensitive configuration files, database credentials, or other critical system information that might be stored in accessible locations. The vulnerability also poses significant risk to content management systems where Newspack Blocks is deployed, as it could allow unauthorized modification of plugin files or access to restricted administrative resources.
Security professionals should note that this vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, a well-documented weakness in software development practices. The issue also maps to several ATT&CK techniques including T1059 for command and scripting interpreter and T1566 for spearphishing attachments, as attackers might exploit this weakness to gain initial access or escalate privileges within compromised systems. Organizations using Newspack Blocks should immediately implement mitigations including updating to the latest available version, implementing proper input validation, and restricting file system permissions to prevent unauthorized access to sensitive resources.
The remediation approach for CVE-2024-37423 requires immediate patching of the Newspack Blocks plugin to version 3.0.9 or later, which contains the necessary fixes to address the path traversal vulnerability. Additionally, administrators should implement proper input validation mechanisms that sanitize all user-provided file path data, employ strict directory traversal restrictions, and utilize secure coding practices that prevent direct incorporation of external data into file system operations. Network segmentation and monitoring should be enhanced to detect potential exploitation attempts, while regular security audits should verify that no unauthorized modifications have occurred to the plugin or affected systems. Organizations should also consider implementing web application firewalls and file integrity monitoring solutions to provide additional layers of protection against similar vulnerabilities in the future.