CVE-2002-0320 in Yahoo!
Summary
by MITRE
Buffer overflow in Yahoo! Messenger 5.0 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long (1) message or (2) IMvironment field.
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Analysis
by VulDB Data Team • 10/23/2024
The vulnerability identified as CVE-2002-0320 represents a critical buffer overflow flaw within Yahoo! Messenger version 5.0 that exposes the application to remote exploitation. This issue stems from insufficient input validation mechanisms within the messaging client's handling of user-provided data, specifically targeting the message content and IMvironment field parameters. The flaw allows malicious actors to craft specially formatted messages that exceed the allocated buffer space, potentially leading to memory corruption and system instability. The vulnerability operates at the application layer and demonstrates a classic buffer overflow pattern that has been documented in numerous security assessments and vulnerability databases. The affected software architecture lacks proper bounds checking procedures, making it susceptible to exploitation through crafted data inputs that manipulate the program's memory management functions.
The technical implementation of this vulnerability involves the manipulation of string handling routines within the Yahoo Messenger, leveraging the existing messaging infrastructure to deliver malicious payloads.
The operational impact of CVE-2002-0320 extends beyond simple denial of service conditions to encompass potential remote code execution capabilities that could compromise user systems. When exploited successfully, this vulnerability allows attackers to gain control over the affected system, potentially leading to complete system compromise or data exfiltration. The vulnerability affects a widely deployed instant messaging client that was popular among both personal and enterprise users, amplifying the potential attack surface. Organizations relying on Yahoo! Messenger for business communications faced significant risk exposure, as the flaw could be exploited through seemingly benign instant messages or chat interactions. The vulnerability's exploitability is enhanced by the fact that it requires no special privileges or authentication to trigger, making it particularly dangerous in environments where users may receive messages from untrusted sources. The attack vector operates through standard network communication protocols, making detection and prevention challenging without proper input validation mechanisms.
Mitigation strategies for CVE-2002-0320 should prioritize immediate software updates and patches provided by Yahoo! Inc. as the primary defense mechanism against exploitation. System administrators should implement network-based controls to monitor and filter incoming instant messaging traffic, particularly focusing on message length validation and content inspection. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and demonstrates characteristics consistent with ATT&CK technique T1059.007 for command and scripting interpreter. Organizations should consider implementing application whitelisting policies to restrict execution of untrusted instant messaging applications and deploy intrusion detection systems capable of identifying suspicious message patterns. Additionally, user education programs should emphasize the dangers of accepting messages from unknown sources and the importance of maintaining current software versions. The vulnerability serves as a historical example of how inadequate input validation can create persistent security weaknesses that remain exploitable for years after initial discovery. Security teams should conduct regular vulnerability assessments to identify similar buffer overflow conditions in other messaging applications and ensure that proper bounds checking mechanisms are implemented throughout the software development lifecycle.