Description

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.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.1",
  "pubDate": "2026-08-18T17:17:01.973Z",
  "pubdate": "2026-08-18T17:17:01.973Z",
  "executiveSummary": "Dell PowerStore SDNAS contains a critical Buffer Copy without Checking Size of Input vulnerability residing within the NFS/RPC component. This security defect exposes enterprise storage systems to severe operational risks, potentially allowing unauthenticated remote threat actors to achieve arbitrary command execution and trigger a complete Denial of Service (DoS). The presence of this vulnerability in a core network storage protocol handling data serialization and remote procedure calls introduces a significant attack surface.\nSuccessful exploitation of this flaw enables malicious actors to bypass standard authentication mechanisms entirely, leveraging remote network access to interact directly with vulnerable RPC endpoints. The primary risk implications include total compromise of system integrity, confidentiality breaches, and service unavailability, which can severely disrupt critical storage operations. Exploitation does not require prior user authentication or administrative privileges, lowering the barrier to entry for potential attackers targeting exposed network interfaces.\nGiven the severity of the potential impact—ranging from system-level command execution to application crashes—organizations utilizing affected Dell PowerStore SDNAS configurations face critical exposure if the storage infrastructure is accessible via untrusted networks. Immediate remediation through vendor-supplied patches and strict boundary defense is strongly advised to mitigate unauthorized remote interaction.",
  "technicalDetails": "The vulnerability is classified as a Buffer Copy without Checking Size of Input flaw, manifesting within the NFS/RPC subsystem of Dell PowerStore SDNAS. The root cause stems from improper input validation and insufficient boundary checking during memory copy operations associated with incoming Remote Procedure Call (RPC) or Network File System (NFS) packets. When the vulnerable component processes incoming RPC requests, it fails to verify whether the size of the incoming data payload exceeds the allocated destination buffer size.\nExploitation occurs when an unauthenticated remote attacker transmits a maliciously crafted NFS or RPC packet containing an oversized payload to the targeted Dell PowerStore SDNAS interface. Due to the absence of rigorous length checks, the incoming data overflows the designated stack or heap buffer boundaries, corrupting adjacent memory regions. This memory corruption can overwrite critical execution pointers or control data structures.\nThe attack flow proceeds as follows: First, the attacker identifies the exposed NFS/RPC service running on the target system. Second, the attacker crafts a specialized request incorporating shellcode or payload data designed to exploit the buffer copy mechanism. Third, the crafted packet is transmitted over the network to the RPC endpoint. Upon receipt, the vulnerable function blindly copies the excessive input into memory.\nThe resulting post-exploitation impact depends on the nature of the overwritten memory. If control flow data is successfully manipulated, the attacker can hijack execution flow to achieve arbitrary command execution under the security context of the affected process. Alternatively, corrupting critical memory structures will destabilize the service, resulting in an immediate Denial of Service (DoS) condition.\nRequirements for successful exploitation include remote network access to the NFS/RPC services exposed by Dell PowerStore SDNAS. No authentication or elevated privileges are required by the attacker to initiate the malicious request sequence, increasing the threat level for network-exposed deployments."
}