CVE-2004-1627 in Ability Server
Summary
by MITRE
Buffer overflow in Ability Server 2.25, 2.32, 2.34, and possibly other versions, allows remote attackers to execute arbitrary code via a long APPE command.
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Analysis
by VulDB Data Team • 06/19/2024
The vulnerability described in CVE-2004-1627 represents a critical buffer overflow flaw affecting Ability Server versions 2.25, 2.32, 2.34, and potentially other iterations. This vulnerability resides within the server's handling of the APPE command, which is typically used for appending data to files within the server environment. The buffer overflow occurs when the server processes a malformed APPE command containing excessive data, causing the application to write beyond the allocated memory boundaries. This fundamental memory management error creates an exploitable condition that can be leveraged by remote attackers to gain unauthorized control over the affected system. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations including return addresses and control data. The impact extends beyond simple denial of service to full system compromise, as demonstrated by the ability to execute arbitrary code remotely. Attackers can craft malicious APPE commands containing carefully constructed payloads that overwrite the instruction pointer, redirecting program execution to malicious code injected into the buffer overflow.
The operational implications of this vulnerability are severe for organizations relying on Ability Server for file management and data handling operations. Remote code execution capabilities mean that attackers can gain complete administrative control over affected servers, potentially leading to data breaches, system compromise, and lateral movement within network environments. The vulnerability affects multiple versions of the server software, indicating a widespread exposure across various deployment scenarios including web hosting environments, file transfer services, and enterprise file management systems. The attack vector requires only network connectivity to the affected service, making it particularly dangerous as it can be exploited from anywhere on the internet without requiring local access or authentication. This characteristic aligns with ATT&CK technique T1203 - Exploitation for Client Execution, where attackers leverage software vulnerabilities to execute malicious code on target systems. The vulnerability's exploitation potential is further amplified by the fact that it affects multiple versions, suggesting that organizations may have multiple vulnerable systems across their infrastructure, increasing the overall attack surface and potential impact.
Mitigation strategies for CVE-2004-1627 must address both immediate remediation and long-term security posture improvements. Organizations should prioritize applying vendor patches or upgrading to versions that contain fixes for the buffer overflow vulnerability, as the original software versions are no longer supported and lack security updates. Implementing network segmentation and access controls can limit the exposure of vulnerable Ability Server instances to untrusted networks, reducing the attack surface available to potential adversaries. Network monitoring and intrusion detection systems should be configured to detect anomalous APPE command patterns and excessive data transfers that may indicate exploitation attempts. Additionally, implementing input validation controls and bounds checking mechanisms within the application layer can provide defense-in-depth protection against similar vulnerabilities. The vulnerability highlights the importance of proper software security practices including code review, memory safety checks, and regular security assessments. Organizations should also consider implementing application whitelisting policies to restrict execution of unauthorized binaries and establish incident response procedures to quickly address potential exploitation attempts. From a compliance perspective, this vulnerability would likely trigger requirements under standards such as iso 27001 and pci dss, which mandate regular vulnerability assessments and prompt remediation of identified security flaws. The long-term solution involves adopting secure coding practices and conducting thorough security testing throughout the software development lifecycle to prevent similar buffer overflow conditions from occurring in future applications.