CVE-2003-0435 in Typespeed
Summary
by MITRE
Buffer overflow in net_swapscore for typespeed 0.4.1 and earlier allows remote attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 05/01/2019
The vulnerability identified as CVE-2003-0435 represents a critical buffer overflow flaw within the net_swapscore function of typespeed version 0.4.1 and earlier. This issue resides in the network-based swapping functionality that processes score data transmitted between clients and servers in the typespeed application. The buffer overflow occurs when the application fails to properly validate input length before copying data into a fixed-size buffer, creating an exploitable condition that can be leveraged by remote attackers.
The technical implementation of this vulnerability stems from improper bounds checking within the net_swapscore function, which handles network communication for score exchanges. When a remote attacker sends a specially crafted payload containing excessive data to the vulnerable typespeed service, the application's memory management fails to enforce size limitations on the receiving buffer. This allows the attacker to overwrite adjacent memory locations, potentially corrupting program execution flow and enabling arbitrary code execution on the target system. The flaw specifically manifests when processing network packets containing score information, making it particularly dangerous in networked environments where the application operates as a server.
The operational impact of this vulnerability extends beyond simple remote code execution, as it can lead to complete system compromise and unauthorized access to sensitive data. Attackers exploiting this buffer overflow can gain elevated privileges, install malware, or establish persistent backdoors within affected systems. The vulnerability affects any system running typespeed 0.4.1 or earlier versions in networked mode, particularly those serving as score servers for multiplayer gaming environments. Organizations with vulnerable systems face significant risks including data breaches, service disruption, and potential lateral movement within their network infrastructure.
Mitigation strategies for CVE-2003-0435 primarily focus on immediate patch deployment and system hardening measures. The most effective solution involves upgrading to typespeed version 0.4.2 or later, which contains proper input validation and buffer size enforcement mechanisms. Network administrators should implement firewall rules to restrict access to typespeed services and consider disabling the network functionality entirely if not required. Additionally, implementing intrusion detection systems and monitoring for unusual network traffic patterns can help detect exploitation attempts. This vulnerability aligns with CWE-121, which addresses stack-based buffer overflow conditions, and maps to ATT&CK technique T1059.007 for command and scripting interpreter usage, as successful exploitation typically involves executing malicious code through compromised system processes. Organizations should also conduct comprehensive vulnerability assessments to identify other potentially affected systems running older versions of the typespeed application.