CVE-2012-6590 in PAN-OS
Summary
by MITRE
The web-based management UI in Palo Alto Networks PAN-OS 4.0.x before 4.0.8 allows remote attackers to obtain verbose error information via crafted input, aka Ref ID 33139.
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Analysis
by VulDB Data Team • 10/06/2018
The vulnerability identified as CVE-2012-6590 affects the web-based management user interface of Palo Alto Networks PAN-OS version 4.0.x before 4.0.8, representing a significant security weakness that exposes systems to potential exploitation by remote attackers. This flaw specifically manifests in the handling of input validation within the management interface, where improperly sanitized user inputs can trigger verbose error messages that reveal sensitive system information to unauthorized parties. The vulnerability falls under the category of information disclosure, which can provide attackers with valuable reconnaissance data for subsequent attacks.
The technical implementation of this vulnerability stems from inadequate input sanitization and error handling mechanisms within the web interface components of the PAN-OS management console. When remote attackers submit crafted inputs to the management UI, the system fails to properly validate or sanitize these inputs before processing them, resulting in the generation of detailed error messages that contain system-specific information including file paths, internal system structures, and potentially sensitive configuration data. This behavior aligns with CWE-209, which describes the improper handling of exceptions and error conditions that can lead to information exposure. The vulnerability essentially represents a failure in the principle of least privilege and secure error handling, where the system should never reveal internal implementation details to external users.
The operational impact of this vulnerability extends beyond simple information disclosure, as the verbose error information can serve as a critical reconnaissance tool for attackers planning more sophisticated attacks against the network security infrastructure. The exposed error details may include system paths, database structures, and internal component names that can be leveraged to craft targeted attacks against specific system components. This vulnerability directly relates to the ATT&CK technique T1068, which involves exploiting remote services and system vulnerabilities, and can enable attackers to escalate their privileges or gain deeper access to the network security appliance. Organizations running affected PAN-OS versions face increased risk of targeted attacks that can compromise their entire network security posture, particularly since the management interface is often accessible from multiple network segments and may be exposed to external networks.
The mitigation strategy for CVE-2012-6590 involves immediate deployment of the vendor-provided security update that addresses the input validation and error handling issues in PAN-OS 4.0.8 and subsequent versions. Organizations should also implement network segmentation to limit access to the management interface, ensuring that only authorized administrative personnel can reach these critical systems. Additional protective measures include implementing web application firewalls to filter malicious inputs, configuring proper input validation rules, and establishing monitoring for unusual error message patterns that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of secure coding practices and proper error handling in web applications, particularly in security infrastructure components where exposure can have cascading effects on overall network security. Organizations should conduct comprehensive vulnerability assessments to identify other similar issues in their network security infrastructure and implement regular security updates to maintain protection against emerging threats.