CVE-2009-2539 in Aigo Md P8860
Summary
by MITRE
The Aigo P8860 allows remote attackers to cause a denial of service (memory consumption and browser hang) via a large integer value for the length property of a Select object, a related issue to CVE-2009-1692.
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Analysis
by VulDB Data Team • 12/04/2024
The vulnerability identified as CVE-2009-2539 represents a significant denial of service flaw affecting the Aigo P8860 device, which operates as a web-based interface for network management and configuration. This issue specifically targets the browser component of the device's web interface, where improper handling of user input leads to system instability and service unavailability. The vulnerability arises from the device's failure to properly validate or sanitize input parameters, particularly when processing Select object properties within web forms. The affected system demonstrates a critical weakness in its input validation mechanisms, creating an opportunity for remote attackers to exploit the device's web interface and disrupt normal operations through crafted malicious input.
The technical flaw manifests when a remote attacker submits a large integer value for the length property of a Select object within the web interface. This particular implementation flaw allows the browser to consume excessive memory resources as it attempts to process the malformed input, ultimately leading to browser hangs and system resource exhaustion. The vulnerability operates at the application layer, specifically targeting the web browser component that renders the device's user interface, making it accessible to attackers without requiring physical access or elevated privileges. The issue is classified as a buffer overflow or memory exhaustion vulnerability, where the system fails to properly handle oversized values and subsequently becomes unresponsive. This behavior aligns with common security weaknesses documented in the CWE database under categories related to improper input validation and memory management errors.
The operational impact of this vulnerability extends beyond simple service disruption, as it can effectively render the entire device inaccessible to authorized users and administrators. When exploited, the vulnerability causes the device's web interface to become unresponsive, requiring manual intervention to restore normal operations through device reboot or power cycling. This denial of service condition severely impacts network management capabilities, potentially leaving network administrators unable to configure or monitor device settings during critical maintenance windows or emergency situations. The vulnerability's remote exploitability means that attackers can target the device from any location with network access, making it particularly dangerous for devices deployed in public or unsecured network environments. Organizations relying on the Aigo P8860 for network management face significant operational risks, as the vulnerability can be exploited without requiring authentication or specialized knowledge of the device's internal architecture.
Mitigation strategies for CVE-2009-2539 should focus on implementing robust input validation mechanisms within the device's web interface components. Network administrators should ensure that all user input, particularly integer values used in Select object properties, undergo proper validation before processing. The implementation of input sanitization routines that reject excessively large integer values can effectively prevent exploitation of this vulnerability. Additionally, organizations should consider implementing network segmentation and access controls to limit exposure of the affected device to untrusted networks. The vulnerability's relationship to CVE-2009-1692 indicates that similar issues may exist within the same device family, warranting comprehensive security assessments of all web-based interfaces. Regular firmware updates and security patches should be applied promptly to address known vulnerabilities, while monitoring systems should be deployed to detect potential exploitation attempts. This vulnerability demonstrates the importance of following secure coding practices and input validation techniques as outlined in industry standards such as the OWASP Top Ten and NIST cybersecurity guidelines. The attack surface for this vulnerability aligns with ATT&CK techniques related to denial of service and web application exploitation, emphasizing the need for comprehensive network security controls that address both external and internal threats to device availability and integrity.