CVE-2006-0808 in MUTE
Summary
by MITRE
MUTE 0.4 allows remote attackers to cause a denial of service (messages not forwarded) and obtain sensitive information about a target by filling a client s mWebCache cache with malicious "zombie" nodes.
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Analysis
by VulDB Data Team • 07/19/2018
The vulnerability identified as CVE-2006-0808 affects MUTE 0.4, a distributed caching system that implements the mWebCache protocol. This security flaw represents a significant weakness in the system's ability to handle malicious input within its caching infrastructure. The vulnerability stems from inadequate validation and sanitization mechanisms within the mWebCache implementation, specifically when processing client requests that contain maliciously constructed data elements.
The technical exploitation of this vulnerability occurs through the deliberate insertion of "zombie" nodes into the client's mWebCache cache structure. These zombie nodes are crafted malicious entries that manipulate the cache's internal state and operational behavior. When the cache becomes filled with these malicious entries, the system's normal message forwarding mechanisms become disrupted, leading to a denial of service condition where legitimate messages fail to be properly transmitted or received. The vulnerability's impact extends beyond simple service disruption as it also enables unauthorized information disclosure, allowing attackers to extract sensitive data about the target system through careful manipulation of the cache contents.
The operational impact of this vulnerability manifests in multiple ways that compromise both availability and confidentiality aspects of the affected system. From a confidentiality perspective, the malicious cache manipulation can expose internal system information that would normally remain protected, potentially revealing network topology details, system configurations, or other sensitive operational data. The denial of service component creates a situation where legitimate users cannot access services through the affected caching infrastructure, effectively disrupting normal operations. This vulnerability particularly affects distributed systems that rely on caching mechanisms for performance optimization, where the cache serves as a critical intermediary between clients and servers.
This vulnerability aligns with several cybersecurity frameworks and classifications including CWE-400, which addresses unchecked resource consumption, and CWE-20, which covers input validation issues. The attack pattern corresponds to techniques described in the MITRE ATT&CK framework under the T1499 category for network denial of service, and potentially T1566 for initial access through malicious cache manipulation. The flaw demonstrates poor resource management practices and inadequate input sanitization, where the system fails to properly validate the integrity and legitimacy of entries before incorporating them into the cache structure. Organizations implementing similar caching solutions should consider implementing strict validation controls, cache entry monitoring, and rate limiting mechanisms to prevent malicious cache population. Additionally, regular cache audits and integrity checks can help detect and mitigate the impact of such malicious entries before they can cause significant disruption to service availability or information disclosure.