CVE-2026-70415 in PowerStore
Summary
by MITRE • 08/18/2026
Dell PowerStore SDNAS contains a Buffer Copy without Checking Size of Input vulnerability in the NFS/RPC. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Command execution and Denial of service.
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Analysis
by VulDB Data Team • 08/18/2026
The identified vulnerability resides within the Network File System (NFS) and Remote Procedure Call (RPC) components of Dell PowerStore Storage Data Services software, specifically classified as a buffer copy operation that fails to validate the size of incoming input data. This architectural flaw allows an unauthenticated attacker who has established remote network access to interact with the affected service endpoints without requiring valid credentials or prior authentication tokens. The core technical issue stems from insufficient boundary checks during the processing of NFS and RPC protocol messages, where the application allocates a fixed-size buffer for handling request payloads but fails to verify that the length of the incoming data does not exceed this allocated limit. When an attacker crafts a specially designed packet with oversized or malformed fields within the NFS/RPC header or payload, the system attempts to copy this excessive amount of data into the pre-allocated memory space without performing necessary size validation checks.
This lack of input sanitization and length verification directly leads to a classic buffer overflow condition, which is formally categorized under Common Weakness Enumeration as CWE-120 Buffer Copy without Checking Size of Input. The operational impact of this vulnerability is severe due to the potential for arbitrary code execution on the affected storage appliance. By carefully crafting the overflow payload, an attacker can overwrite adjacent memory locations, including return addresses or function pointers within the process stack or heap. This manipulation allows the injection and subsequent execution of malicious shellcode, effectively granting the attacker remote command execution capabilities with the privileges of the compromised service account. In many enterprise environments, storage services run with elevated system-level permissions to manage hardware resources efficiently, meaning successful exploitation could result in full control over the underlying operating system hosting the PowerStore software.
Beyond the critical risk of unauthorized code execution, this vulnerability also presents a significant threat to availability through Denial of Service conditions. Even if an attacker does not successfully exploit the buffer overflow for command injection, the act of sending malformed or excessively large packets can cause the NFS/RPC service process to crash due to memory corruption or segmentation faults. Such crashes disrupt access to storage resources for legitimate users and applications relying on the PowerStore array, leading to operational downtime and potential data unavailability during critical business operations. The combination of remote exploitability without authentication makes this a high-severity issue that requires immediate attention from security teams responsible for maintaining the integrity and availability of enterprise storage infrastructure.
To mitigate these risks, organizations must ensure that Dell PowerStore systems are updated with the latest firmware versions provided by the vendor, which include patches addressing the input validation logic in the NFS/RPC stack. Network-level controls should be implemented to restrict access to NFS ports (typically TCP/UDP 2049) and RPC services only from trusted management networks or specific authorized hosts using firewall rules or Access Control Lists. Additionally, deploying intrusion detection systems capable of identifying anomalous packet sizes or malformed protocol structures can provide an additional layer of defense by blocking exploit attempts before they reach the vulnerable application logic. Continuous monitoring for unusual process behavior or service restarts associated with storage services is also recommended to detect potential exploitation activities in real time.