CVE-2004-2280 in Lotus Notes
Summary
by MITRE
Buffer overflow in IBM Lotus Notes 6.5.x before 6.5.3 and 6.0.x before 6.0.5 allows remote attackers to cause a denial of service (crash) via unknown vectors related to Java applets, as identified by KSPR62F4KN.
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Analysis
by VulDB Data Team • 07/04/2025
The vulnerability identified as CVE-2004-2280 represents a critical buffer overflow flaw affecting IBM Lotus Notes versions 6.5.x prior to 6.5.3 and 6.0.x prior to 6.0.5. This security weakness specifically manifests within the Java applet processing functionality of the Lotus Notes client software, creating an exploitable condition that can be remotely triggered by malicious actors. The vulnerability was catalogued under the KSPR62F4KN identifier, indicating its classification within IBM's security tracking system and highlighting the severity of the issue. The buffer overflow occurs when the application processes Java applets, which are small programs designed to run within web browsers and provide extended functionality to Lotus Notes users. This particular vulnerability demonstrates the inherent risks associated with Java applet execution within enterprise email and collaboration platforms, where users may inadvertently encounter malicious content that exploits memory management flaws in the application's processing pipeline.
The technical exploitation of this buffer overflow vulnerability occurs when maliciously crafted Java applets are delivered to vulnerable Lotus Notes clients through email messages or web-based interfaces. When the vulnerable application attempts to process these applets, the insufficient bounds checking in the memory allocation routines causes data to be written beyond the allocated buffer space, leading to memory corruption that ultimately results in application crash. This type of vulnerability falls under the CWE-121 CWE category known as "Stack-based Buffer Overflow," though the specific implementation in this case involves heap memory corruption due to improper handling of dynamically allocated Java applet data structures. The flaw represents a classic example of improper input validation where the application fails to properly verify the size and content of data being processed from external sources, particularly when dealing with untrusted Java bytecode that could be embedded within email messages or web content. The vulnerability's remote exploitability means that attackers do not require physical access to the target system, as they can simply deliver malicious Java applets through email or web interfaces that are processed by the vulnerable Lotus Notes client.
The operational impact of CVE-2004-2280 extends beyond simple service disruption, as it creates a significant risk for enterprise environments that rely heavily on Lotus Notes for email and collaboration services. When successfully exploited, the buffer overflow causes the Lotus Notes client application to crash, resulting in immediate denial of service for the affected user while potentially disrupting broader collaboration workflows that depend on the application's availability. Organizations using Lotus Notes in mission-critical environments face substantial risk of productivity loss and potential data accessibility issues when this vulnerability is exploited, particularly in scenarios where users receive email messages containing malicious Java applets. The vulnerability's impact is exacerbated by the widespread adoption of Lotus Notes in enterprise settings during this period, where the application served as a primary communication platform for many organizations. The remote nature of the attack vector means that security administrators must consider the entire email infrastructure as potentially compromised, as attackers can deliver malicious payloads through standard email channels without requiring any special privileges or physical access to the target systems. This vulnerability also demonstrates the broader security challenges associated with rich client applications that execute untrusted code, highlighting the importance of robust input validation and memory safety mechanisms in enterprise software.
Organizations affected by this vulnerability should immediately implement the security patches provided by IBM as part of their regular security update cycle, specifically upgrading to Lotus Notes versions 6.5.3 or 6.0.5, which contain the necessary fixes for the buffer overflow conditions. System administrators should also consider implementing additional network-based protections such as email filtering solutions that can identify and quarantine potentially malicious Java applets before they reach end-user systems. The mitigation strategy should include comprehensive security awareness training for users to recognize suspicious email content and avoid opening attachments or clicking links that may contain malicious Java applets. From a defensive perspective, this vulnerability highlights the importance of maintaining up-to-date software patches and implementing network segmentation to limit the potential impact of such exploits. The ATT&CK framework categorizes this vulnerability under the T1203 technique for "Exploitation for Client Execution," as it involves leveraging application vulnerabilities to execute malicious code on target systems. Organizations should also consider implementing application whitelisting policies that restrict the execution of untrusted Java applets, particularly in environments where the risk of targeted attacks is high. The vulnerability serves as a reminder of the critical importance of maintaining robust software supply chain security practices and the need for continuous monitoring of security advisories from vendors to ensure timely patch deployment across enterprise environments.