CVE-2022-31474 in iThemes BackupBuddy Plugin
Summary
by MITRE • 03/13/2023
Directory Traversal vulnerability in iThemes BackupBuddy plugin 8.5.8.0 - 8.7.4.1 versions.
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Analysis
by VulDB Data Team • 06/17/2024
The directory traversal vulnerability identified as CVE-2022-31474 affects the iThemes BackupBuddy plugin version range from 8.5.8.0 through 8.7.4.1, representing a critical security flaw that allows unauthorized access to sensitive files on affected systems. This vulnerability stems from inadequate input validation within the plugin's file handling mechanisms, specifically when processing user-supplied paths during backup and restore operations. The flaw enables attackers to manipulate file paths and access files outside the intended directory structure, potentially exposing critical system information, configuration files, and user data.
The technical implementation of this vulnerability resides in the plugin's handling of relative path references without proper sanitization of user inputs. Attackers can exploit this weakness by crafting malicious requests that include directory traversal sequences such as "../" or "..\" to navigate beyond the plugin's intended file access boundaries. When the plugin processes these malformed paths, it fails to adequately validate or sanitize the input, allowing arbitrary file access that can lead to information disclosure, system compromise, or data exfiltration. This type of vulnerability falls under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to access sensitive system components including wp-config.php files containing database credentials, user authentication tokens, and other critical configuration data. Additionally, the vulnerability may allow attackers to upload malicious files or execute arbitrary code within the plugin's context, potentially leading to full system compromise. The affected plugin versions represent a significant attack surface since BackupBuddy is commonly used for backup operations, making it a prime target for attackers seeking to gain access to WordPress installations and their underlying data.
Security professionals should consider this vulnerability in the context of the ATT&CK framework, specifically under the techniques related to credential access and privilege escalation. The vulnerability aligns with ATT&CK technique T1566 for credential access through the exploitation of software vulnerabilities, and T1078 for valid accounts usage through the potential compromise of system access. Organizations using affected plugin versions face increased risk of data breaches, regulatory compliance violations, and potential legal consequences due to unauthorized access to sensitive information.
Mitigation strategies should include immediate patching of the affected plugin versions to the latest available release, which contains the necessary input validation and sanitization fixes. System administrators should also implement additional security controls such as restricting file permissions, implementing web application firewalls, and monitoring for suspicious file access patterns. Regular security assessments and vulnerability scanning should be conducted to identify other potential directory traversal vulnerabilities within the WordPress ecosystem. The remediation process must also include comprehensive testing to ensure that the patch does not introduce compatibility issues with existing backup operations or system configurations.