CVE-2002-1306 in KDE
Summary
by MITRE
Multiple buffer overflows in LISa on KDE 2.x for 2.1 and later, and KDE 3.x before 3.0.4, allow (1) local and possibly remote attackers to execute arbitrary code via the "lisa" daemon, and (2) remote attackers to execute arbitrary code via a certain "lan://" URL.
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Analysis
by VulDB Data Team • 09/06/2025
The vulnerability described in CVE-2002-1306 represents a critical security flaw affecting the LISa daemon component within KDE desktop environments versions 2.1 through 3.0.3. This issue manifests as multiple buffer overflow conditions that create significant attack vectors for malicious actors seeking to compromise affected systems. The vulnerability specifically targets the LISa daemon which serves as a network discovery and management tool within the KDE ecosystem, making it a prime target for exploitation due to its network-facing capabilities and privileged execution context.
The technical implementation of this vulnerability stems from improper input validation and memory management within the LISa daemon's handling of network requests and URL parsing. When processing certain network protocols or malformed lan:// URLs, the daemon fails to properly bounds-check user-supplied input data before copying it into fixed-length buffers. This classic buffer overflow condition allows attackers to overwrite adjacent memory locations, potentially including return addresses, function pointers, or other critical control data structures. The flaw exists in the protocol handling layer where the daemon processes incoming network traffic and URL requests, particularly when parsing the lan:// scheme which is used for network browsing and discovery within the KDE environment.
The operational impact of this vulnerability extends beyond simple local privilege escalation to include potential remote code execution capabilities that could be leveraged by attackers positioned outside the local network. Local attackers can exploit the buffer overflow to execute arbitrary code with the privileges of the LISa daemon process, which typically runs with elevated permissions due to its system management functions. Remote attackers can exploit the vulnerability through specially crafted lan:// URLs that, when processed by the daemon, trigger the buffer overflow condition. This creates a particularly dangerous scenario where network-based attacks can be launched against vulnerable KDE installations without requiring prior authentication or direct access to the target system.
The exploitability of this vulnerability is further enhanced by the widespread adoption of KDE desktop environments in enterprise and organizational settings during the early 2000s. Systems running affected KDE versions often had the LISa daemon enabled by default, creating numerous potential attack surfaces. The vulnerability affects both local and remote execution scenarios, making it particularly dangerous for networked environments where users might unknowingly visit malicious websites or receive crafted network requests. This issue aligns with CWE-121, which describes buffer overflow conditions in stack-based buffers, and represents a classic example of how improper memory management can create persistent security weaknesses in system components.
Mitigation strategies for this vulnerability require immediate patching of affected KDE installations to version 3.0.4 or later, which contains the necessary fixes for the buffer overflow conditions. System administrators should also implement network segmentation and access controls to limit exposure of vulnerable systems to untrusted network traffic. Additionally, disabling the LISa daemon functionality when not required, particularly in network-facing environments, provides an additional layer of defense. The vulnerability demonstrates the importance of proper input validation and memory management practices in system components, and serves as a reminder of how seemingly benign network discovery tools can become attack vectors when not properly secured. Organizations should implement regular security assessments of desktop environments and maintain up-to-date patch management procedures to prevent exploitation of similar vulnerabilities in the future.