CVE-2012-2208 in Piwigo
Summary
by MITRE
Directory traversal vulnerability in upgrade.php in Piwigo before 2.3.4 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the language parameter.
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Analysis
by VulDB Data Team • 03/24/2025
The vulnerability identified as CVE-2012-2208 represents a critical directory traversal flaw in the Piwigo photo gallery software version 2.3.3 and earlier. This issue specifically affects the upgrade.php script which handles software upgrades and administrative functions within the Piwigo platform. The vulnerability stems from insufficient input validation and sanitization of user-supplied parameters, creating an exploitable condition that allows malicious actors to manipulate file inclusion mechanisms.
The technical implementation of this vulnerability occurs through the manipulation of the language parameter in the upgrade.php script. When attackers submit crafted input containing directory traversal sequences such as .. (dot dot), the application fails to properly validate or sanitize this input before using it in file operations. This allows the attacker to traverse the file system hierarchy and access arbitrary local files that should normally be protected from external access. The flaw essentially permits attackers to bypass normal access controls and potentially execute arbitrary code on the vulnerable system.
From an operational impact perspective, this vulnerability presents significant security risks to Piwigo installations. Remote attackers can leverage this flaw to include and execute local files, potentially leading to complete system compromise. The vulnerability enables attackers to access sensitive configuration files, database credentials, and other system resources that may contain confidential information. Additionally, the ability to execute arbitrary code on the target system creates opportunities for privilege escalation, data exfiltration, and persistent backdoor installation.
The vulnerability aligns with CWE-22, which specifically addresses "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", and maps to several ATT&CK techniques including T1059 for command and scripting interpreter and T1078 for valid accounts. The attack surface is particularly concerning as it affects the upgrade functionality, which is often accessible to authenticated users or even unauthenticated users in some configurations. This makes the vulnerability particularly dangerous in environments where upgrade processes are frequently accessed or where weak authentication controls exist.
Mitigation strategies for this vulnerability include immediate patching to version 2.3.4 or later, which contains the necessary input validation fixes. Organizations should implement proper input sanitization measures that validate and filter all user-supplied parameters before processing them in file operations. Network segmentation and access controls should be enforced to limit exposure of administrative functions to trusted networks only. Additionally, implementing web application firewalls and regular security scanning can help detect and prevent exploitation attempts. System administrators should also monitor for suspicious file access patterns and maintain comprehensive audit logs to detect potential exploitation attempts.