CVE-2014-0256 in Windows
Summary
by MITRE
Microsoft Windows Server 2008 SP2 and R2 SP1 and Server 2012 Gold allow remote attackers to cause a denial of service (iSCSI service outage) by sending many crafted packets, aka "iSCSI Target Remote Denial of Service Vulnerability."
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Analysis
by VulDB Data Team • 06/19/2021
The CVE-2014-0256 vulnerability represents a significant remote denial of service flaw affecting Microsoft Windows Server 2008 SP2 and R2 SP1 as well as Server 2012 Gold systems. This vulnerability specifically targets the iSCSI target service implementation within these server operating systems, creating a critical operational weakness that can be exploited by remote attackers to disrupt storage services. The vulnerability falls under the broader category of denial of service attacks that specifically target storage infrastructure components, making it particularly dangerous in enterprise environments where reliable storage connectivity is paramount for business operations. According to CWE-400, this vulnerability manifests as an uncontrolled resource consumption issue where the iSCSI target service fails to properly handle malformed or crafted network packets, leading to service instability and potential complete system outages.
The technical exploitation mechanism of this vulnerability involves sending a large volume of specially crafted iSCSI packets to the target server's iSCSI target service. These crafted packets are designed to trigger memory corruption or resource exhaustion conditions within the iSCSI implementation, causing the service to crash or become unresponsive. The vulnerability exploits a lack of proper input validation and error handling within the iSCSI target service, where the system fails to adequately process malformed packets received over the network. The attack requires minimal privileges and can be executed from any remote location with network access to the affected iSCSI target service, making it particularly dangerous as it can be exploited by adversaries without requiring authentication or local system access. This characteristic places the vulnerability in the ATT&CK framework under the T1499.004 technique category, which specifically addresses network denial of service attacks targeting storage services.
The operational impact of CVE-2014-0256 extends far beyond simple service disruption, as iSCSI target services form critical components of enterprise storage infrastructures. When the iSCSI target service becomes unavailable due to this vulnerability, organizations face potential data access outages, application downtime, and significant business disruption. The vulnerability can affect virtualization environments, database servers, and any systems relying on iSCSI storage connectivity, creating cascading failures throughout the IT infrastructure. Organizations with large-scale storage deployments may experience complete loss of storage connectivity for extended periods, requiring manual intervention to restore services. The vulnerability's potential for automated exploitation means that attackers can quickly deploy mass scanning tools to identify and exploit multiple systems simultaneously, amplifying the impact across networked environments. According to industry best practices and security frameworks, this vulnerability represents a critical risk that requires immediate attention and remediation to prevent operational disruption and maintain service availability.
Mitigation strategies for CVE-2014-0256 primarily focus on implementing Microsoft security updates and applying the relevant patches released in the April 2014 security bulletin. Organizations should prioritize patching affected systems immediately, as the vulnerability has been widely exploited in the wild. Network-level protections including firewall rules that restrict access to iSCSI target ports and implementing rate limiting for iSCSI traffic can provide additional defensive layers. System administrators should also consider disabling iSCSI target services on systems where they are not required, reducing the attack surface. Monitoring network traffic for unusual patterns of iSCSI packet transmission and implementing intrusion detection systems can help identify exploitation attempts before they cause service disruption. The vulnerability highlights the importance of maintaining up-to-date security patches across all server infrastructure components and demonstrates how storage-related vulnerabilities can have far-reaching operational consequences for enterprise environments. Security teams should also conduct regular vulnerability assessments to identify other potential iSCSI-related weaknesses and ensure comprehensive protection against similar classes of attacks targeting storage infrastructure components.