CVE-2006-0339 in BitComet
Summary
by MITRE
Buffer overflow in BitComet Client 0.60 allows remote attackers to execute arbitrary code, when the publisher s name link is clicked, via a long publisher URI in a torrent file.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 06/13/2019
The vulnerability identified as CVE-2006-0339 represents a critical buffer overflow flaw within the BitComet Client version 0.60 that exposes users to remote code execution risks. This security weakness specifically manifests when users interact with torrent files containing maliciously crafted publisher URI data, creating a dangerous scenario where legitimate user actions can trigger exploitable conditions. The vulnerability operates through the client's handling of torrent file metadata, particularly focusing on the publisher name field that contains URI information.
The technical implementation of this buffer overflow stems from inadequate input validation within the BitComet client's parsing mechanism for torrent file components. When a user clicks on a publisher URI link contained within a torrent file, the client attempts to process the URI data without sufficient bounds checking or buffer size validation. This fundamental flaw in the software's input handling allows an attacker to craft a malicious torrent file with an excessively long publisher URI that exceeds the allocated buffer space, causing memory corruption and potentially enabling arbitrary code execution. The vulnerability directly maps to CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows data to overwrite adjacent memory locations.
The operational impact of this vulnerability extends beyond simple exploitation, as it creates a sophisticated attack vector that can be delivered through legitimate torrent sharing networks. Attackers can distribute malicious torrent files that appear trustworthy, relying on users' natural behavior of clicking on publisher links to obtain additional information about the content. This social engineering component significantly increases the likelihood of successful exploitation, as users are not actively warned about potential security risks when engaging with what appears to be normal torrent file interactions. The attack requires minimal technical expertise from the adversary while offering maximum impact, making it particularly dangerous in peer-to-peer networks where file sharing is common.
Security professionals should recognize this vulnerability as part of the broader category of client-side buffer overflow attacks that have historically plagued file sharing applications. The flaw demonstrates the critical importance of input validation and memory safety practices in networked applications, particularly those handling untrusted data from external sources. Organizations and individual users should implement immediate mitigations including updating to patched versions of BitComet, implementing network monitoring to detect suspicious torrent file patterns, and establishing security awareness training to educate users about the risks of clicking on unknown publisher links. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving client-side exploitation and social engineering, representing a classic example of how seemingly benign user interactions can be weaponized for remote code execution. The vulnerability also highlights the need for robust software development practices including static code analysis, dynamic testing, and input sanitization to prevent similar issues in future software releases.