CVE-2003-1223 in WebLogic Server
Summary
by MITRE
The Node Manager for BEA WebLogic Express and Server 6.1 through 8.1 SP 1 allows remote attackers to cause a denial of service (Node Manager crash) via malformed data to the Node Manager s port, as demonstrated by nmap.
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Analysis
by VulDB Data Team • 06/22/2019
The vulnerability identified as CVE-2003-1223 affects the Node Manager component of BEA WebLogic Express and Server versions 6.1 through 8.1 SP1. This issue represents a classic buffer overflow or input validation flaw that enables remote attackers to disrupt service availability by sending malformed data to the Node Manager's listening port. The Node Manager serves as a critical administrative component responsible for managing WebLogic server instances, making this vulnerability particularly concerning from a security perspective. The vulnerability specifically targets the network communication layer where the Node Manager processes incoming connections and data streams, creating a potential attack vector that could be exploited by malicious actors to compromise system availability.
The technical implementation of this vulnerability stems from inadequate input validation within the Node Manager's network protocol handling mechanisms. When the Node Manager receives malformed data on its designated port, the system fails to properly sanitize or validate the incoming payload, leading to unexpected behavior that ultimately results in process termination or system crash. This type of flaw typically manifests as a failure to properly handle buffer boundaries or protocol parsing, allowing attackers to craft specific payloads that trigger memory corruption or resource exhaustion conditions. The vulnerability's exploitation requires minimal sophistication as demonstrated by the nmap proof-of-concept, indicating that even basic network scanning tools can be leveraged to identify and potentially exploit this weakness.
From an operational impact perspective, this vulnerability creates significant risk for organizations relying on BEA WebLogic Server infrastructure, as it directly enables denial of service attacks that can render critical business applications unavailable. The Node Manager's role in server administration means that its compromise can result in complete loss of administrative control over WebLogic instances, forcing organizations to either restart services manually or face extended downtime while recovery procedures are implemented. The attack surface is particularly concerning given that the Node Manager typically operates on a well-known port and may be accessible from external networks, especially in improperly configured environments. Organizations may experience service disruption that affects business continuity, potentially leading to financial losses and reputational damage when critical applications become unavailable due to this vulnerability.
The security implications of CVE-2003-1223 align with CWE-121, which describes buffer overflow conditions in heap-based memory management, and can be categorized under ATT&CK technique T1499 for network denial of service attacks. Effective mitigation strategies include applying the vendor-provided patches and updates released for BEA WebLogic Server versions 6.1 through 8.1 SP1, implementing network segmentation to restrict access to the Node Manager port, and configuring proper firewall rules to limit exposure. Organizations should also consider disabling the Node Manager service if it is not required for their operational environment, as well as implementing network monitoring to detect anomalous traffic patterns that may indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and secure coding practices, particularly in administrative components that handle untrusted network data. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in legacy systems and ensure that all components receive appropriate security updates to prevent exploitation by threat actors.