CVE-2009-3744 in RepliStor
Summary
by MITRE
rep_serv.exe 6.3.1.3 in the server in EMC RepliStor allows remote attackers to cause a denial of service via a crafted packet to TCP port 7144.
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Analysis
by VulDB Data Team • 09/28/2025
The vulnerability identified as CVE-2009-3744 affects EMC RepliStor server software version 6.3.1.3, specifically targeting the rep_serv.exe service component. This issue represents a remote denial of service vulnerability that can be exploited by attackers without requiring authentication or privileged access. The vulnerability manifests through a crafted packet sent to TCP port 7144, which is the designated port for the RepliStor replication service. The affected system operates within enterprise data protection environments where replication services are critical for maintaining data availability and disaster recovery capabilities.
The technical flaw in rep_serv.exe stems from inadequate input validation mechanisms within the packet processing routine. When the service receives a malformed or specially crafted packet on TCP port 7144, the application fails to properly handle the unexpected data structure, leading to service termination or system instability. This type of vulnerability falls under CWE-129, Input Validation, and specifically relates to improper validation of input data that can cause application crashes or unexpected behavior. The vulnerability demonstrates a classic buffer overflow or parsing error scenario where the service does not adequately sanitize incoming network traffic before processing it, creating an exploitable condition that allows remote attackers to disrupt the normal operation of the replication service.
The operational impact of this vulnerability extends beyond simple service disruption, as it affects the core replication functionality that organizations rely upon for data protection and business continuity. When the rep_serv.exe process crashes or becomes unresponsive, it can result in replication failures, data inconsistency issues, and potential data loss scenarios. Organizations using EMC RepliStor for critical data protection may experience extended downtime while the service recovers, potentially impacting their disaster recovery capabilities and overall data availability. The vulnerability's remote exploitability means that attackers can target these systems from external networks without requiring physical access or local credentials, making it particularly dangerous in enterprise environments where such services may be exposed to untrusted networks.
Mitigation strategies for CVE-2009-3744 should focus on both immediate protective measures and long-term security enhancements. Network administrators should implement firewall rules to restrict access to TCP port 7144, limiting connections to trusted sources only and blocking unauthorized external access to the replication service port. Additionally, organizations should apply the vendor-provided security patches or updates that address the input validation issues in rep_serv.exe. The ATT&CK framework categorizes this vulnerability under T1499, Network Denial of Service, as it enables attackers to disrupt network services through crafted network packets. System monitoring should be enhanced to detect unusual patterns of service restarts or connection attempts to port 7144, and organizations should consider implementing intrusion detection systems to identify potential exploitation attempts. Regular security assessments of enterprise replication services and network configurations should be conducted to identify similar vulnerabilities in other critical services that may be exposed to external network traffic.