CVE-2001-0244 in Index Server
Summary
by MITRE
Buffer overflow in Microsoft Index Server 2.0 allows remote attackers to execute arbitrary commands via a long search parameter.
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Analysis
by VulDB Data Team • 05/09/2019
The vulnerability identified as CVE-2001-0244 represents a critical buffer overflow flaw within Microsoft Index Server 2.0 that exposes systems to remote code execution attacks. This issue stems from inadequate input validation mechanisms within the search functionality of the indexing service, creating a pathway for malicious actors to exploit the software through carefully crafted search parameters. The vulnerability specifically affects the way the application handles user input during search operations, where excessively long search strings can overwrite adjacent memory regions, potentially allowing attackers to inject and execute arbitrary code on the targeted system. The buffer overflow occurs in the processing of search queries, making it particularly dangerous as it can be triggered through web-based interfaces that utilize the Index Server functionality. This vulnerability directly maps to CWE-121, which describes buffer overflow conditions where insufficient space is allocated for data, and aligns with ATT&CK technique T1203, which involves exploitation of software vulnerabilities for code execution.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise and potential lateral movement within network environments. Attackers leveraging this flaw can gain unauthorized access to systems running vulnerable Index Server versions, potentially escalating privileges and establishing persistent access points. The vulnerability affects systems where Index Server 2.0 is deployed, particularly those used for web-based search functionalities, and can be exploited through various network interfaces including HTTP and other web protocols that interface with the indexing service. Organizations running multiple web applications that rely on Index Server for search capabilities face heightened risk, as the vulnerability can be triggered through standard web browsing activities or automated attack vectors. The exploitability of this vulnerability is enhanced by the fact that it requires minimal user interaction beyond sending a specially crafted search request, making it particularly dangerous in environments where web applications are publicly accessible.
Mitigation strategies for CVE-2001-0244 should prioritize immediate patching of affected systems with Microsoft security updates, as the vulnerability has been addressed through official Microsoft security bulletins. Organizations must implement network segmentation and access controls to limit exposure of vulnerable systems to untrusted networks, particularly those that do not require direct web access to Index Server functionality. Input validation and sanitization measures should be strengthened at application layers that interact with search functions, including implementing length limits on search parameters and employing proper error handling mechanisms. Network monitoring and intrusion detection systems should be configured to detect anomalous search parameter patterns that may indicate exploitation attempts, while regular security assessments should verify that no vulnerable components remain operational. Additionally, implementing web application firewalls and application-level security controls can provide additional layers of protection against exploitation attempts targeting this specific vulnerability. The remediation process should include thorough testing of patches in controlled environments before deployment to ensure compatibility with existing applications that depend on Index Server functionality, while maintaining detailed logs of all search operations for forensic analysis purposes.