CVE-2017-12859 in Data Ontap
Summary
by MITRE
NetApp Data ONTAP before 8.2.5, when operating in 7-Mode in NFS environments, allows remote attackers to cause a denial of service via unspecified vectors.
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Analysis
by VulDB Data Team • 11/08/2019
The vulnerability identified as CVE-2017-12859 represents a critical denial of service weakness in NetApp Data ONTAP systems operating in 7-Mode NFS environments. This flaw affects versions prior to 8.2.5 and demonstrates the persistent security challenges that can exist in enterprise storage systems where legacy configurations continue to operate. The vulnerability specifically targets NFS (Network File System) environments within the 7-Mode architecture, which represents an older operational model that many organizations continue to maintain for compatibility reasons despite newer alternatives being available.
The technical nature of this vulnerability involves unspecified attack vectors that allow remote adversaries to trigger system instability and service disruption. According to CWE classification, this vulnerability falls under the category of insufficient input validation and improper error handling, where the system fails to properly process certain network requests or file operations that could lead to resource exhaustion or system state corruption. The unspecified nature of the attack vectors suggests that multiple pathways exist for exploitation, making the vulnerability particularly concerning for security teams who must account for various potential attack surfaces within their storage infrastructure.
From an operational perspective, the impact of this vulnerability extends beyond simple service interruption to potentially compromise the entire storage infrastructure that organizations rely upon for critical business operations. When an NFS server becomes unavailable due to this denial of service condition, it affects all clients that depend on file access through that system, potentially causing cascading failures across dependent applications and services. The remote exploitation capability means that attackers do not need physical access or network proximity to the system, significantly increasing the attack surface and making the vulnerability particularly dangerous in connected network environments.
The ATT&CK framework categorizes this vulnerability under the execution and privilege escalation domains, as it allows attackers to disrupt system operations and potentially gain further access to the storage environment. Organizations implementing 7-Mode configurations in their Data ONTAP systems face significant risk when these systems are not properly updated or patched, as they become vulnerable to exploitation that could lead to extended downtime, data access disruption, and potential business continuity impacts. Security teams should consider this vulnerability as part of a broader assessment of legacy storage system configurations and their associated risk profiles.
Mitigation strategies for CVE-2017-12859 primarily focus on upgrading to NetApp Data ONTAP version 8.2.5 or later, which contains the necessary patches to address the vulnerability. Organizations should also implement network segmentation and access controls to limit exposure of vulnerable systems to untrusted networks. Additionally, monitoring systems should be configured to detect unusual patterns of NFS traffic that might indicate exploitation attempts, and regular security assessments should be conducted to identify other legacy configurations that may be similarly vulnerable. The vulnerability highlights the importance of maintaining current system versions and the risks associated with operating legacy storage environments without proper security updates and patches.