CVE-2003-0715 in Windows
Summary
by MITRE
Heap-based buffer overflow in the Distributed Component Object Model (DCOM) interface in the RPCSS Service allows remote attackers to execute arbitrary code via a malformed DCERPC DCOM object activation request packet with modified length fields, a different vulnerability than CVE-2003-0352 (Blaster/Nachi) and CVE-2003-0528.
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Analysis
by VulDB Data Team • 12/31/2024
The vulnerability described in CVE-2003-0715 represents a critical heap-based buffer overflow within the Distributed Component Object Model interface of the Remote Procedure Call Subsystem service. This flaw exists in the RPCSS service which is fundamental to Windows operating systems and handles DCOM object activation requests. The vulnerability specifically targets the processing of DCERPC DCOM object activation packets where attackers can manipulate length fields to trigger the buffer overflow condition. Unlike related vulnerabilities such as CVE-2003-0352 (Blaster/Nachi) and CVE-2003-0528, this issue demonstrates distinct characteristics in its exploitation vectors and attack surface. The DCOM interface serves as a crucial communication mechanism between distributed applications and is extensively used in enterprise environments for component-based software development and system integration.
The technical implementation of this vulnerability occurs when the RPCSS service processes malformed DCERPC DCOM object activation requests containing modified length fields in the packet structure. During normal operation, the service parses incoming DCOM requests and allocates memory buffers to accommodate the expected data. However, when attackers craft packets with manipulated length fields, the service's input validation fails to properly check these values against allocated buffer boundaries. This discrepancy allows attackers to write data beyond the intended buffer limits, causing a heap-based buffer overflow condition. The heap corruption occurs in the memory management system where the service dynamically allocates and manages memory for processing DCOM requests, making the exploitation particularly dangerous as it can lead to arbitrary code execution in the context of the RPCSS service.
The operational impact of this vulnerability extends beyond simple remote code execution, creating a significant security risk for affected systems. When successfully exploited, attackers can gain arbitrary code execution privileges within the RPCSS service context, which typically runs with high system privileges on Windows systems. This elevated privilege level allows attackers to perform actions such as installing malware, modifying system files, creating new user accounts, or establishing persistent backdoors. The vulnerability affects Windows 2000, Windows XP, and Windows Server 2003 systems, making it particularly concerning for enterprise environments where these operating systems were widely deployed. The attack vector requires network connectivity and does not need authentication, making it particularly dangerous as it can be exploited remotely without prior access to the target system.
Mitigation strategies for CVE-2003-0715 should focus on both immediate patching and network-level protections. Microsoft released security updates addressing this vulnerability through Windows Update and security bulletins, which should be applied immediately to all affected systems. Network administrators should implement firewall rules to block incoming traffic on TCP ports 135 and 139, which are commonly used by DCOM services. Additionally, implementing network segmentation and access control lists can limit the attack surface by restricting access to RPCSS service endpoints. System hardening practices including disabling unnecessary DCOM functionality, restricting DCOM server activation permissions, and implementing least privilege principles for RPCSS service accounts should be considered. Organizations should also deploy intrusion detection systems capable of monitoring for suspicious DCOM traffic patterns and malformed packet structures that could indicate exploitation attempts. This vulnerability aligns with CWE-121 and CWE-122 categories related to buffer overflow conditions and improper input validation, while the attack methodology corresponds to techniques found in the ATT&CK framework under initial access and execution phases, specifically targeting service execution and remote code execution capabilities.