CVE-2002-0967 in Edonkey2000
Summary
by MITRE
Buffer overflow in eDonkey 2000 35.16.60 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long "ed2k:" URL.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 05/20/2019
The vulnerability described in CVE-2002-0967 represents a critical buffer overflow flaw within the eDonkey 2000 file sharing client version 35.16.60 and earlier. This issue affects a widely used peer-to-peer networking application that facilitated file sharing across the internet during the early 2000s. The vulnerability specifically manifests when the application processes maliciously crafted ed2k: URLs, which are protocol identifiers used by the eDonkey network for file location references. The buffer overflow occurs during the parsing of these URLs, where insufficient input validation allows attackers to overflow the allocated memory buffer and potentially overwrite adjacent memory regions.
The technical implementation of this vulnerability stems from improper bounds checking within the URL parsing routine of the eDonkey client. When a user encounters a specially crafted ed2k: URL, the client attempts to process the URL string without adequate length verification, leading to memory corruption that can result in application crashes or more severe exploitation. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, which is classified as a fundamental memory safety issue that has been extensively documented in cybersecurity literature and remains a prevalent concern in software development practices.
The operational impact of this vulnerability extends beyond simple denial of service to potentially enable remote code execution, making it particularly dangerous in networked environments. Attackers could leverage this flaw to crash the targeted client application, effectively disrupting legitimate file sharing operations, or in more sophisticated attacks, execute arbitrary code with the privileges of the affected user. The vulnerability's exploitation potential is enhanced by the fact that eDonkey 2000 was widely deployed across various operating systems and was often used in environments where users had limited security awareness, creating numerous potential attack vectors.
From a cybersecurity perspective, this vulnerability demonstrates the critical importance of input validation and memory safety practices in networked applications. The ATT&CK framework would categorize this as a technique involving 'Exploitation for Client Execution' under the broader category of 'Exploitation of Remote Services' where attackers leverage software vulnerabilities to gain unauthorized access or execute malicious code. Organizations and users should have implemented immediate mitigations including software updates, network segmentation to prevent unauthorized URL execution, and user education regarding the dangers of untrusted URLs. The vulnerability also underscores the necessity of regular security assessments and the implementation of defensive programming practices such as using safe string handling functions and implementing proper bounds checking mechanisms to prevent similar issues in future software development cycles.