CVE-2002-0472 in MSN Messenger
Summary
by MITRE
MSN Messenger Service 3.6, and possibly other versions, uses weak authentication when exchanging messages between clients, which allows remote attackers to spoof messages from other users.
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Analysis
by VulDB Data Team • 05/10/2019
The vulnerability described in CVE-2002-0472 represents a critical weakness in the MSN Messenger Service 3.6 implementation that fundamentally undermines the security of message authentication between client applications. This flaw exists within the communication protocol used by Microsoft's instant messaging service, specifically affecting version 3.6 and potentially other iterations of the software. The vulnerability stems from insufficient cryptographic measures during the authentication process, creating an exploitable condition that allows malicious actors to manipulate message integrity and authenticity.
The technical implementation of this vulnerability resides in the weak authentication mechanisms employed during message exchange operations. MSN Messenger Service 3.6 fails to properly validate the identity of message senders, relying on insufficient authentication tokens or session identifiers that can be easily replicated or forged by remote attackers. This weakness directly violates established security principles for secure communication protocols and creates a pathway for man-in-the-middle attacks where adversaries can insert malicious content into conversations. The flaw operates at the application layer of the network stack, specifically targeting the authentication and message integrity components that should ensure only legitimate users can participate in secure messaging sessions.
The operational impact of this vulnerability extends beyond simple message spoofing to potentially compromise the entire trust model of the MSN Messenger service. Attackers can exploit this weakness to impersonate legitimate users, inject false information into conversations, or manipulate ongoing communications between parties. This capability undermines the fundamental security assumptions of instant messaging systems and can lead to various malicious activities including social engineering attacks, information disclosure, or the disruption of communication channels. The vulnerability particularly affects collaborative environments where trust in message authenticity is crucial for maintaining secure communication protocols and business operations.
Mitigation strategies for CVE-2002-0472 should focus on implementing stronger authentication mechanisms and cryptographic protections within the messaging service. Organizations should consider upgrading to newer versions of MSN Messenger or alternative secure communication platforms that employ robust authentication protocols. The fix should incorporate proper session management, strong cryptographic signatures for message authentication, and implementation of secure key exchange mechanisms. Security professionals should also implement network monitoring to detect anomalous message patterns and consider deploying additional layers of authentication such as two-factor authentication or certificate-based verification. This vulnerability aligns with CWE-310, which addresses cryptographic weaknesses in authentication systems, and represents a classic example of insufficient authentication that maps to ATT&CK technique T1566 related to credential harvesting through social engineering and message manipulation attacks.
The broader implications of this vulnerability demonstrate the critical importance of proper authentication design in instant messaging systems and highlight how weak cryptographic implementations can compromise entire communication ecosystems. This flaw serves as a historical example of how insecure authentication mechanisms can enable widespread message forgery attacks and underscores the necessity of implementing robust security controls in all communication protocols. Organizations should conduct comprehensive security assessments of their messaging infrastructure and ensure that all authentication mechanisms meet current industry standards for cryptographic strength and protocol integrity.