CVE-2011-4967 in tog-Pegasus
Summary
by MITRE
tog-Pegasus has a package hash collision DoS vulnerability
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Analysis
by VulDB Data Team • 03/04/2025
The CVE-2011-4967 vulnerability affects the tog-Pegasus implementation of the Web Services for Management (WS-Management) protocol, specifically targeting the package hash collision mechanism that serves as a critical security control within the system. This vulnerability represents a denial of service condition that arises from improper handling of hash values during package processing, fundamentally undermining the integrity of the management framework. The flaw manifests when the system encounters hash collisions in its package validation mechanisms, causing the service to become unresponsive or crash entirely.
The technical implementation of this vulnerability stems from the hash table collision handling within the Pegasus management framework's package processing module. When multiple packages are processed through the system, the hash function used to organize and retrieve package information fails to properly manage collisions, leading to cascading failures in the hash table structure. This weakness allows an attacker to craft malicious package requests that deliberately trigger hash collisions, causing the system to consume excessive computational resources or enter an unstable state where legitimate requests cannot be processed. The vulnerability operates at the application layer and can be exploited through the WS-Management protocol interface, making it particularly dangerous in enterprise environments where management services are heavily relied upon.
The operational impact of this vulnerability extends beyond simple service disruption, as it can severely compromise the availability of critical management infrastructure within enterprise networks. Organizations relying on Pegasus for system monitoring, configuration management, and remote administration face significant risk when this vulnerability exists in their environment, as it can be exploited to deny access to management services that are essential for maintaining system integrity. The attack surface is particularly concerning given that WS-Management is commonly used for automated system administration tasks, making the system vulnerable to both accidental and intentional exploitation that could result in extended downtime and operational disruption. This vulnerability directly impacts the availability component of the CIA triad and can be classified under the CWE-327 weakness category related to weak cryptographic hash functions.
Mitigation strategies for CVE-2011-4967 should focus on implementing robust hash collision handling mechanisms within the Pegasus management framework, including the adoption of more secure hash functions that are less susceptible to collision attacks. Organizations should consider upgrading to patched versions of the Pegasus implementation that address the hash table collision vulnerabilities, while also implementing monitoring and alerting mechanisms to detect potential exploitation attempts. Network segmentation and access controls can help limit the attack surface, ensuring that only authorized entities can submit package requests to the management service. Additionally, implementing rate limiting and resource allocation controls can help prevent exploitation attempts from consuming excessive system resources and can be aligned with the ATT&CK technique T1499.004 for network denial of service attacks. The remediation process should also include comprehensive testing of the hash collision handling mechanisms to ensure that the patched implementation properly manages edge cases and maintains system stability under various load conditions.