CVE-2008-0139 in loudblog
Summary
by MITRE
Eval injection vulnerability in loudblog/inc/parse_old.php in Loudblog 0.8.0 and earlier allows remote attackers to execute arbitrary PHP code via the template parameter.
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Analysis
by VulDB Data Team • 10/13/2024
The CVE-2008-0139 vulnerability represents a critical server-side code injection flaw discovered in the Loudblog content management system version 0.8.0 and earlier. This vulnerability resides within the parse_old.php file located in the loudblog/inc/ directory, where the application fails to properly validate or sanitize user input before processing it within a PHP evaluation context. The vulnerability specifically affects the template parameter handling mechanism, which allows malicious actors to inject arbitrary PHP code that gets executed on the target server. This type of vulnerability falls under the category of code injection attacks and is classified as CWE-94, which describes the execution of arbitrary code or commands.
The technical exploitation of this vulnerability occurs when an attacker manipulates the template parameter to include malicious PHP code within the parse_old.php script. Since the application directly evaluates user-supplied input without proper sanitization, any code included in the template parameter gets executed as PHP code on the server. This creates a severe security risk where attackers can perform arbitrary operations including file manipulation, database access, privilege escalation, and potentially complete system compromise. The vulnerability is particularly dangerous because it allows remote code execution without requiring authentication, making it an attractive target for automated exploitation tools.
From an operational perspective, this vulnerability poses significant risks to organizations using affected Loudblog installations. The remote execution capability means that attackers can compromise systems from anywhere on the internet without needing physical access or valid credentials. The impact extends beyond simple code execution to include potential data breaches, system infiltration, and service disruption. Attackers can leverage this vulnerability to establish persistent backdoors, exfiltrate sensitive information, or use the compromised system as a launch point for further attacks against internal networks. The vulnerability also demonstrates poor input validation practices that violate fundamental security principles outlined in the OWASP Top Ten and other industry standards.
Mitigation strategies for CVE-2008-0139 should include immediate patching of the Loudblog application to version 0.8.1 or later, which contains the necessary fixes for the input validation issues. Organizations should also implement proper input sanitization measures including parameter validation, output encoding, and the use of secure coding practices that prevent direct evaluation of user input. Network-level protections such as web application firewalls and intrusion detection systems can help detect and block exploitation attempts. Additionally, regular security audits and vulnerability assessments should be conducted to identify similar issues in other applications and systems. The vulnerability aligns with ATT&CK technique T1059.007 for Windows command and scripting interpreter, demonstrating how improper input handling can lead to code execution in web applications. Organizations should also consider implementing principle of least privilege access controls and regular security monitoring to detect unauthorized access attempts.