CVE-2024-27279 in A-Blog CMS
Summary
by MITRE • 03/12/2024
Directory traversal vulnerability exists in a-blog cms Ver.3.1.x series Ver.3.1.9 and earlier, Ver.3.0.x series Ver.3.0.30 and earlier, Ver.2.11.x series Ver.2.11.59 and earlier, Ver.2.10.x series Ver.2.10.51 and earlier, and Ver.2.9 and earlier versions. If this vulnerability is exploited, a user with editor or higher privilege who can login to the product may obtain arbitrary files on the server including password files.
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Analysis
by VulDB Data Team • 11/01/2024
This directory traversal vulnerability in a-blog cms represents a critical security flaw that allows authenticated attackers with editor privileges or higher to access arbitrary files on the affected server. The vulnerability affects multiple versions across different major releases including 3.1.x series up to 3.1.9, 3.0.x series up to 3.0.30, 2.11.x series up to 2.11.59, 2.10.x series up to 2.10.51, and all versions prior to 2.9. The technical implementation likely involves improper input validation in file handling functions where user-supplied paths are not adequately sanitized before being processed, enabling attackers to manipulate directory navigation sequences such as ../ to access files outside the intended directory structure.
The operational impact of this vulnerability is severe as it provides attackers with the ability to read sensitive files including password files, configuration data, and potentially other system resources that could contain confidential information. This type of vulnerability falls under CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is classified as a path traversal attack that can lead to unauthorized data access and system compromise. Attackers could leverage this vulnerability to extract database credentials, application configuration files, user authentication data, and other sensitive information that could be used for further exploitation or lateral movement within the network infrastructure.
The attack vector requires an authenticated user with editor privileges or higher, which means that the vulnerability is not directly exploitable by anonymous users but rather by individuals who already have some level of access to the system. This makes the vulnerability particularly dangerous in environments where multiple users have varying levels of access, as a compromised editor account could provide attackers with significant access to the underlying system. The vulnerability aligns with ATT&CK technique T1083 - File and Directory Discovery, where attackers attempt to enumerate files and directories to find sensitive information. Additionally, this issue contributes to broader ATT&CK tactics including privilege escalation and credential access, as successful exploitation could provide attackers with credentials and access to additional system resources.
Organizations using affected versions of a-blog cms should immediately implement mitigations including applying the latest available patches from the vendor, implementing proper input validation and sanitization for all file handling operations, and restricting file access permissions to limit what files can be read by authenticated users. Network segmentation and monitoring should be enhanced to detect unusual file access patterns that might indicate exploitation attempts. The vulnerability also highlights the importance of proper access control implementation where users should only have access to files and functions necessary for their specific roles. Regular security audits and penetration testing should be conducted to identify similar path traversal vulnerabilities in other applications and systems within the organization's infrastructure.