CVE-2001-1504 in Lotus Notes
Summary
by MITRE
Lotus Notes R5 Client 4.6 allows remote attackers to execute arbitrary commands via a Lotus Notes object with code in an event, which is automatically executed when the user processes the e-mail message.
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Analysis
by VulDB Data Team • 04/10/2019
The vulnerability identified as CVE-2001-1504 represents a critical security flaw in the Lotus Notes R5 Client version 4.6 that enables remote code execution through maliciously crafted email messages. This vulnerability exploits the client-side processing of Lotus Notes objects within email communications, creating a pathway for attackers to execute arbitrary commands on affected systems. The flaw fundamentally undermines the security model of the email client by allowing malicious code to be automatically executed when users process seemingly benign email messages containing specially crafted objects.
The technical mechanism behind this vulnerability involves the improper handling of Lotus Notes objects embedded within email messages. When a user opens an email containing a malicious Notes object with embedded code, the client automatically executes the code without proper validation or sandboxing. This behavior stems from the client's trust model that assumes objects within email messages are safe and legitimate. The vulnerability specifically targets the event handling mechanism within the Notes client, where code attached to objects is triggered during normal email processing operations. This represents a classic sandbox escape vulnerability where the application fails to properly isolate potentially malicious content from the execution environment.
From an operational impact perspective, this vulnerability poses severe risks to organizations relying on Lotus Notes email systems. An attacker can leverage this flaw to gain full control over a user's system, potentially leading to data theft, privilege escalation, or use of the compromised system as a pivot point for further attacks within the network. The automatic execution aspect means that simply opening an email message can result in system compromise without any user interaction beyond normal email processing. This makes the vulnerability particularly dangerous in environments where users frequently receive emails from external sources or where social engineering attacks are common.
The vulnerability maps to CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: Python" within the execution phase of the attack chain. Organizations should implement immediate mitigations including disabling the automatic execution of embedded objects in email clients, implementing email filtering solutions that can detect and block malicious Notes objects, and ensuring users receive proper security training about opening suspicious email attachments. Additionally, the vulnerability highlights the importance of proper input validation and object sanitization in client-side applications, emphasizing the need for defense-in-depth strategies that include network segmentation, endpoint protection solutions, and regular security updates to address similar flaws in legacy systems.