CVE-2017-3621 in Sun ZFS Storage Appliance Kit
Summary
by MITRE
Vulnerability in the Sun ZFS Storage Appliance Kit (AK) component of Oracle Sun Systems Products Suite (subcomponent: IPC Frameworks). The supported version that is affected is AK 2013. Easily "exploitable" vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Sun ZFS Storage Appliance Kit (AK). Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Sun ZFS Storage Appliance Kit (AK). CVSS 3.0 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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Analysis
by VulDB Data Team • 12/20/2020
The vulnerability identified as CVE-2017-3621 resides within the Sun ZFS Storage Appliance Kit component of Oracle's Sun Systems Products Suite, specifically within the IPC Frameworks subcomponent. This represents a critical availability-focused weakness that affects the AK 2013 version of the storage appliance. The vulnerability's classification as easily exploitable indicates that attackers require minimal prerequisites to launch successful attacks, making it particularly dangerous in production environments where these appliances typically serve as core storage infrastructure. The affected system operates within enterprise data centers where storage reliability and availability are paramount for business continuity operations.
The technical flaw manifests through inadequate input validation within the IPC frameworks that govern inter-process communication mechanisms. Attackers can exploit this weakness by sending malformed or specially crafted network requests through multiple protocols that the appliance supports, bypassing authentication requirements entirely. This vulnerability operates at the network level, allowing remote attackers to leverage the appliance's IPC mechanisms without requiring valid credentials or privileged access. The underlying issue likely stems from insufficient bounds checking or improper handling of message structures within the inter-process communication framework, creating opportunities for buffer overflows or other memory corruption conditions that can be triggered through network-based attacks.
The operational impact of this vulnerability extends beyond simple service disruption, as successful exploitation can lead to complete denial of service conditions that cause the appliance to hang or repeatedly crash. This represents a high-severity availability compromise that can severely impact enterprise storage operations, potentially leading to data unavailability, service interruptions, and significant business disruption. Organizations relying on ZFS Storage Appliance Kit for critical data storage operations may experience extended downtime during recovery periods, with the frequency of repeatable crashes indicating that the appliance could become permanently unavailable until manual intervention occurs. The CVSS 3.0 base score of 7.5 reflects the high availability impact combined with the low attack complexity and lack of required privileges, making this vulnerability particularly concerning for enterprise security teams.
Mitigation strategies should prioritize immediate patching of affected systems through Oracle's official security updates, as the vulnerability affects a specific version of the appliance that likely received targeted fixes. Network segmentation and firewall rule implementations can help reduce exposure by limiting access to only trusted networks and restricting communication protocols to essential services only. Organizations should implement monitoring solutions to detect unusual network traffic patterns or repeated connection attempts that might indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes buffer overflow conditions in heap-based memory management, and represents a typical example of how IPC framework vulnerabilities can be exploited for denial of service attacks. From an ATT&CK framework perspective, this vulnerability maps to the T1499.004 technique related to network denial of service attacks, where adversaries leverage system weaknesses to disrupt availability of services. Security teams should also consider implementing intrusion detection systems to monitor for exploitation attempts and establish incident response procedures specifically designed for handling appliance-level denial of service conditions.