CVE-2005-2618 in Lotus Notes
Summary
by MITRE
Multiple stack-based buffer overflows in Autonomy (formerly Verity) KeyView SDK before 9.2.0, as used in Lotus Notes 6.5.4 and 7.0, allow remote attackers to execute arbitrary code via (1) a UUE file containing an encoded file with a long filename handled by uudrdr.dll, (2) a compressed ZIP file with a long filename handled by kvarcve.dll, (3) a TAR archive with a long filename that is extracted to a directory with a long path handled by the TAR reader (tarrdr.dll), (4) an email that contains a long HTTP, FTP, or // link handled by the HTML speed reader (htmsr.dll) or (5) an email containing a crafted long link handled by the HTML speed reader (htmsr.dll).
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Analysis
by VulDB Data Team • 06/30/2025
The vulnerability described in CVE-2005-2618 represents a critical stack-based buffer overflow issue affecting the Autonomy KeyView SDK, which was integrated into Lotus Notes versions 6.5.4 and 7.0. This vulnerability stems from inadequate input validation mechanisms within several core components of the SDK that process various file formats and protocols. The affected modules include uudrdr.dll for handling UUE files, kvarcve.dll for processing compressed ZIP archives, tarrdr.dll for TAR archive extraction, and htmsr.dll for HTML content parsing. These components fail to properly validate the length of filenames and paths during processing, creating exploitable conditions that can be leveraged by remote attackers to execute arbitrary code on vulnerable systems.
The technical flaw manifests through multiple attack vectors that all share the common weakness of insufficient bounds checking on user-supplied data. When processing UUE files with excessively long filenames, the uudrdr.dll component overflows its stack buffer, potentially allowing attackers to overwrite critical memory locations including return addresses and function pointers. Similarly, ZIP file processing through kvarcve.dll and TAR archive extraction via tarrdr.dll suffer from identical buffer overflow conditions when encountering filenames or directory paths that exceed predetermined length limits. The HTML speed reader component htmsr.dll presents additional attack surfaces through HTTP, FTP, and UNC network path handling, where long URL links can trigger stack corruption. These vulnerabilities are classified under CWE-121 as stack-based buffer overflow conditions, representing a fundamental flaw in memory management where attacker-controlled data exceeds the allocated buffer space.
The operational impact of this vulnerability is severe and far-reaching, particularly given the widespread deployment of Lotus Notes in enterprise environments. Remote attackers can exploit these conditions to gain arbitrary code execution privileges on target systems, potentially leading to complete system compromise and unauthorized access to sensitive corporate data. The attack vectors span across multiple file formats and network protocols, making the vulnerability particularly dangerous as it can be triggered through various means including email attachments, web content, and network file transfers. Organizations running affected versions of Lotus Notes face significant risk of data breaches, system infiltration, and potential lateral movement within their networks, as successful exploitation could provide attackers with persistent access to critical business infrastructure. This vulnerability aligns with ATT&CK technique T1203 (Exploitation for Client Execution) and T1059 (Command and Scripting Interpreter) as attackers can leverage these buffer overflows to execute malicious payloads and establish command and control capabilities.
Mitigation strategies for CVE-2005-2618 should prioritize immediate patching of affected Lotus Notes installations to version 7.0.1 or later, which includes the necessary fixes for the KeyView SDK components. Organizations should implement network segmentation and email filtering mechanisms to reduce exposure to potentially malicious attachments, particularly those containing UUE, ZIP, and TAR file formats. System administrators should consider disabling unnecessary file processing capabilities within Lotus Notes to minimize attack surface, while also implementing robust input validation controls at network boundaries. Security monitoring should be enhanced to detect unusual file processing patterns and potential exploitation attempts, with particular attention to long filename and path handling within email content and file transfer protocols. Additionally, regular security assessments should verify that all components utilizing the KeyView SDK have been properly updated and that appropriate access controls are in place to limit potential impact from successful exploitation attempts.