CVE-2012-5488 in Plone
Summary
by MITRE
python_scripts.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to execute Python code via a crafted URL, related to createObject.
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Analysis
by VulDB Data Team • 03/29/2022
The vulnerability identified as CVE-2012-5488 represents a critical remote code execution flaw in the Plone content management system that affects versions prior to 4.2.3 and 4.3 beta 1. This vulnerability resides within the python_scripts.py module and specifically exploits the createObject functionality to allow attackers to execute arbitrary Python code on the target system. The flaw fundamentally stems from inadequate input validation and sanitization mechanisms within the Plone framework's object creation processes, creating a pathway for malicious actors to inject and execute unauthorized code remotely.
The technical nature of this vulnerability aligns with CWE-94, which describes improper control of generation of code, specifically indicating that the application is generating code based on user-supplied input without proper validation or sanitization. The flaw occurs when the createObject function processes user-provided parameters through URLs, allowing attackers to craft malicious URLs that contain Python code payloads. This represents a classic server-side code injection vulnerability where the application fails to properly separate executable code from data, enabling an attacker to manipulate the execution flow of the application.
The operational impact of this vulnerability is severe and far-reaching, as it provides remote attackers with complete system compromise capabilities. Once exploited, attackers can execute arbitrary commands with the privileges of the web application, potentially leading to full system takeover, data exfiltration, and persistence mechanisms. The vulnerability affects not just individual applications but entire Plone installations, making it particularly dangerous for organizations that rely on this CMS platform. The remote nature of the exploit means that attackers can leverage this vulnerability from anywhere on the internet without requiring local access or authentication.
Organizations should implement immediate mitigations including upgrading to Plone versions 4.2.3 or later, which contain patches addressing this vulnerability. Network segmentation and firewall rules should be configured to restrict access to Plone applications, particularly limiting direct internet exposure where possible. Input validation should be strengthened at all entry points, and the principle of least privilege should be enforced for web application accounts. Additionally, security monitoring should be enhanced to detect unusual patterns of URL access that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059.001 for command and scripting interpreter, as the exploitation involves executing code through the Python interpreter, and T1190 for exploit for client execution, since the vulnerability enables remote code execution through web-based attack vectors. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for and block malicious URL patterns associated with this specific exploit.