CVE-2008-6742 in Foxy
Summary
by MITRE
Foxy P2P software allows remote attackers to cause a denial of service (memory consumption) via a foxy URI with a download action and a large fs value.
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Analysis
by VulDB Data Team • 10/28/2024
The vulnerability identified as CVE-2008-6742 affects Foxy P2P software, a peer-to-peer file sharing application that enables users to distribute and download files across a network. This particular flaw represents a denial of service condition that can be triggered remotely by malicious actors seeking to disrupt service availability for legitimate users. The vulnerability specifically manifests when the software processes a specially crafted foxy URI containing a download action with an excessively large fs parameter value, leading to abnormal memory consumption patterns that can ultimately result in system instability or complete service disruption.
The technical mechanism underlying this vulnerability involves improper input validation within the Foxy P2P software's URI processing framework. When the application encounters a foxy URI with a download action and an inflated fs value, it fails to implement adequate bounds checking or memory allocation limits for the file size parameter. This absence of proper validation allows an attacker to specify an arbitrarily large file size value that the software attempts to process, resulting in excessive memory allocation and consumption. The flaw resides in the application's handling of user-supplied data without sufficient sanitization, creating an avenue for resource exhaustion attacks that can be executed remotely without requiring authentication or privileged access.
From an operational perspective, this vulnerability presents significant risks to systems running Foxy P2P software, particularly in environments where continuous availability is critical. The memory consumption pattern triggered by this attack can cause the application to consume all available system memory, leading to system slowdowns, crashes, or complete system hang conditions. Network administrators and security teams must consider the potential for cascading effects, as a single compromised system could impact broader network operations if the P2P software is widely deployed across an organization. The remote nature of the attack means that threat actors can exploit this vulnerability from anywhere on the network, making it particularly dangerous for systems with exposed P2P services or those operating in untrusted network environments.
This vulnerability aligns with several cybersecurity standards and frameworks, including CWE-129 which addresses improper validation of input boundaries, and CWE-400 which covers unchecked resource allocation. The attack pattern corresponds to the ATT&CK technique T1499.004 for Network Denial of Service, demonstrating how resource exhaustion attacks can be leveraged against peer-to-peer networking applications. The flaw also reflects broader concerns about input sanitization in networked applications, similar to issues documented in CWE-770 for allocation of resources without limits or throttling. Organizations should implement proper input validation mechanisms, establish memory allocation limits for file size parameters, and deploy network monitoring solutions to detect anomalous memory consumption patterns that may indicate exploitation attempts.
Mitigation strategies for this vulnerability should include immediate software updates from the vendor to address the input validation flaw, implementation of network-level restrictions to prevent unauthorized access to P2P services, and deployment of memory monitoring solutions to detect abnormal consumption patterns. System administrators should also consider implementing rate limiting for URI processing, establishing proper resource limits for P2P applications, and conducting regular security assessments to identify similar validation issues in other networked applications. Additionally, network segmentation and access controls should be enforced to limit exposure of P2P services to trusted networks only, reducing the attack surface available to potential adversaries seeking to exploit this vulnerability.