CVE-2005-2448 in ekg
Summary
by MITRE
Multiple "endianness errors" in libgadu in ekg before 1.6rc2 allow remote attackers to cause a denial of service (invalid behavior in applications) on big-endian systems.
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Analysis
by VulDB Data Team • 06/09/2019
The vulnerability identified as CVE-2005-2448 represents a critical endianness handling flaw within the libgadu library component of the ekg instant messaging client. This issue specifically affects systems utilizing big-endian processor architectures where the byte order differs significantly from the typical little-endian systems. The libgadu library serves as a core communication module for ekg, implementing protocols for instant messaging and presence services. These endianness errors occur during the processing of network packets and data structures that are not properly converted between different byte order representations, creating a fundamental mismatch in how binary data is interpreted across different hardware platforms.
The technical nature of this vulnerability stems from improper handling of multi-byte data types within the network protocol implementation. When ekg processes incoming network data on big-endian systems, the library fails to correctly interpret the byte ordering of various protocol fields, leading to unpredictable behavior that manifests as application instability or complete termination. This occurs because the library assumes a particular byte order for data processing without accounting for the underlying system architecture's endianness. The flaw creates a scenario where legitimate network traffic can trigger memory corruption or invalid state transitions within the application's processing pipeline, effectively enabling remote attackers to exploit this weakness from outside the system boundary.
From an operational perspective, this vulnerability presents a significant risk to organizations relying on ekg for instant messaging services, particularly those operating on big-endian hardware platforms such as certain network appliances, embedded systems, or specialized computing environments. The denial of service impact means that attackers can remotely disrupt messaging services by sending specifically crafted packets that exploit the endianness handling errors. This vulnerability is particularly concerning because it affects the fundamental communication layer of the application, potentially compromising availability of critical messaging infrastructure. The attack vector requires only network access to the affected system, making it easily exploitable from remote locations without requiring privileged access or complex prerequisites.
The vulnerability aligns with CWE-1021, which specifically addresses "Improper Restriction of Operations within the Bounds of a Memory Buffer," and relates to the broader category of improper input validation and data handling issues. From an ATT&CK framework perspective, this vulnerability maps to T1499.004, which covers "Endpoint Denial of Service," and potentially T1595.001 for "Active Scanning" as attackers would need to identify vulnerable systems before exploitation. The remediation strategy requires updating to ekg version 1.6rc2 or later, which includes proper endianness handling mechanisms. Organizations should also implement network segmentation to limit exposure, monitor for unusual network traffic patterns, and conduct vulnerability assessments to identify other potentially affected systems running older versions of the ekg client. Additionally, system administrators should consider implementing automatic update mechanisms to ensure rapid deployment of security patches across all affected platforms.