CVE-2003-0638 in iChain
Summary
by MITRE
Multiple buffer overflows in Novell iChain 2.1 before Field Patch 3, and iChain 2.2 before Field Patch 1a, allow attackers to cause a denial of service (ABEND) and possibly execute arbitrary code via (1) a long user name or (2) an unknown attack related to a "special script against login."
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Analysis
by VulDB Data Team • 06/15/2018
The vulnerability identified as CVE-2003-0638 represents a critical security flaw affecting Novell iChain 2.1 and 2.2 software versions prior to specific field patches. This issue stems from multiple buffer overflow conditions that occur when the system processes user input, particularly in authentication contexts. The vulnerability affects the core authentication mechanisms of the iChain platform, which serves as a web-based access management solution for enterprise environments. These buffer overflows create exploitable conditions that can be leveraged by malicious actors to disrupt service availability and potentially gain unauthorized system access.
The technical implementation of this vulnerability manifests through two primary attack vectors that exploit different aspects of the authentication process. The first vector involves sending excessively long user names to the system, which triggers buffer overflow conditions in memory management routines responsible for processing authentication requests. The second vector relates to a "special script against login" that appears to exploit an unknown weakness in the login processing module, likely involving malformed input sequences that bypass normal validation checks. Both attack vectors demonstrate the presence of insufficient input validation and inadequate memory boundary checking within the software's authentication subsystem. This weakness aligns with common CWE classifications related to buffer overflows and input validation failures, specifically CWE-121 and CWE-787 which address stack-based and heap-based buffer overflows respectively.
The operational impact of CVE-2003-0638 extends beyond simple denial of service conditions to potentially enable remote code execution, making it a particularly dangerous vulnerability for enterprise environments. When exploited, these buffer overflows can cause system abend conditions that result in complete service disruption, requiring system restarts and potentially leading to data loss or corruption. The ability to execute arbitrary code through these vulnerabilities means that attackers could gain full control over affected systems, potentially establishing persistent backdoors or using the compromised systems as launch points for further attacks within the network. This vulnerability particularly affects organizations relying on Novell iChain for web access management and authentication services, creating significant risks for enterprises with extensive network infrastructure dependent on this platform.
Organizations affected by CVE-2003-0638 should immediately implement the available field patches from Novell to address both buffer overflow conditions. The remediation process requires careful planning and testing to ensure that the patches do not introduce compatibility issues with existing applications or configurations. System administrators should also implement network segmentation and access controls to limit exposure while patches are deployed. Monitoring for exploitation attempts through intrusion detection systems becomes critical, as these vulnerabilities often result in detectable network traffic patterns during attack attempts. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing proper input validation mechanisms, aligning with ATT&CK techniques related to privilege escalation and defense evasion. Organizations should also consider implementing additional security controls such as web application firewalls and enhanced logging to detect and prevent exploitation attempts, while ensuring that all authentication systems undergo regular security assessments to identify similar vulnerabilities in other components of their infrastructure.