CVE-2003-1300 in Baby FTP Server
Summary
by MITRE
Baby FTP Server (BabyFTP) 1.2, and possibly other versions before May 31, 2003, allows remote attackers to cause a denial of service via a large number of connections from the same IP address, which triggers an access violation.
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Analysis
by VulDB Data Team • 07/04/2017
The vulnerability identified as CVE-2003-1300 affects Baby FTP Server version 1.2 and potentially earlier versions released before May 31, 2003, representing a significant denial of service weakness that can be exploited by remote attackers. This flaw manifests when an attacker establishes a large number of concurrent connections from a single IP address, causing the server application to experience an access violation that results in system instability and service disruption. The vulnerability stems from inadequate connection handling mechanisms within the FTP server implementation, where the system fails to properly manage or limit concurrent connections from the same source, leading to memory corruption or resource exhaustion conditions that trigger the access violation error. This represents a classic resource exhaustion attack vector that exploits the server's inability to gracefully handle abnormal connection patterns.
The technical implementation of this vulnerability demonstrates poor input validation and connection management practices within the Baby FTP Server software architecture. When multiple simultaneous connections are established from a single IP address, the server's internal connection tracking mechanisms become overwhelmed, leading to memory corruption that manifests as an access violation error. This type of vulnerability aligns with CWE-400, which categorizes unchecked resource consumption as a weakness that can lead to denial of service conditions. The access violation occurs because the server's memory management routines fail to properly handle the excessive connection load, causing the application to crash or become unresponsive. The vulnerability is particularly concerning as it requires minimal resources to exploit, making it accessible to attackers with basic network connectivity and no specialized tools.
The operational impact of CVE-2003-1300 extends beyond simple service disruption to potentially compromise the entire network infrastructure that relies on the affected FTP server. When exploited successfully, the vulnerability can render the FTP service completely unavailable to legitimate users while simultaneously consuming system resources and potentially causing cascading failures in dependent services. Network administrators may experience difficulty in diagnosing the root cause of the service interruption, as the access violation may appear as a system crash rather than a clear connection denial. The vulnerability also creates opportunities for attackers to perform reconnaissance activities by testing connection limits and identifying the specific threshold at which the server becomes unstable. This type of attack aligns with ATT&CK technique T1499.004, which covers network denial of service attacks through resource exhaustion.
Mitigation strategies for this vulnerability should focus on implementing connection rate limiting and monitoring mechanisms to prevent abuse of the FTP server's connection handling capabilities. System administrators should deploy firewall rules or network access control lists to limit the number of concurrent connections permitted from individual IP addresses, effectively preventing the exploitation of this vulnerability. Additionally, implementing proper connection timeout mechanisms and connection pooling strategies can help maintain server stability under abnormal load conditions. The most effective long-term solution involves upgrading to a patched version of the Baby FTP Server software that includes proper connection management and resource allocation controls. Security monitoring systems should be configured to detect unusual connection patterns and alert administrators to potential exploitation attempts. Organizations should also consider implementing intrusion detection systems that can identify and block suspicious connection behavior before it can cause service disruption. The vulnerability highlights the importance of proper resource management and input validation in server applications, emphasizing that all network services should implement robust connection handling mechanisms to prevent similar issues from occurring in other software components.