CVE-2012-5503 in Plone
Summary
by MITRE
ftp.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to read hidden folder contents via unspecified vectors.
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Analysis
by VulDB Data Team • 03/13/2019
The vulnerability identified as CVE-2012-5503 affects Plone content management systems prior to versions 4.2.3 and 4.3 beta 1, specifically within the ftp.py module. This security flaw represents a critical access control weakness that enables remote attackers to bypass normal file system permissions and access hidden or restricted folder contents through unspecified attack vectors. The vulnerability resides in the file transfer protocol implementation within Plone's web application framework, creating an unauthorized data disclosure risk that could expose sensitive organizational information.
The technical nature of this vulnerability stems from insufficient input validation and access control mechanisms within the ftp.py script that handles file system operations. Attackers can exploit this weakness to traverse directory structures and retrieve files that should normally be protected from public access. The unspecified vectors suggest that multiple attack pathways may exist, potentially including malformed requests, improper authentication handling, or inadequate permission checks during file system navigation. This type of vulnerability falls under the CWE-284 access control weakness category, specifically addressing improper access control in web applications where unauthorized users can access restricted resources through protocol implementation flaws.
The operational impact of CVE-2012-5503 extends beyond simple information disclosure, as it can lead to comprehensive system compromise when combined with other attack vectors. Organizations running affected Plone versions face significant risk of data breaches, intellectual property theft, and potential system infiltration when attackers can access hidden configuration files, backup data, or sensitive user information stored in protected directories. The vulnerability particularly affects organizations that rely on Plone for content management, as it undermines the fundamental security assumptions of file system access control and could enable attackers to discover system architecture details, authentication credentials, or other sensitive data that should remain hidden from unauthorized users.
Mitigation strategies for this vulnerability require immediate patching of affected Plone installations to versions 4.2.3 or later 4.3 beta 1, which contain the necessary security fixes. Organizations should also implement network segmentation and access control measures to limit exposure of Plone systems to untrusted networks. Additional defensive measures include regular security audits of file system permissions, monitoring for unusual file access patterns, and implementing web application firewalls to detect and block suspicious requests targeting the ftp.py module. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and credential access, as attackers can leverage the flaw to gain unauthorized access to system resources that would otherwise be protected. Organizations should also consider implementing automated vulnerability scanning tools to identify similar access control weaknesses in other components of their web application infrastructure.