CVE-2021-0197 in Ethernet Network Controller E810
Summary
by MITRE • 11/17/2021
Protection mechanism failure in the firmware for the Intel(R) Ethernet Network Controller E810 before version 1.5.5.6 may allow a privileged user to enable a denial of service via local access.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 11/21/2021
The vulnerability identified as CVE-2021-0197 represents a critical protection mechanism failure within the firmware of Intel's Ethernet Network Controller E810 series. This flaw specifically affects firmware versions prior to 1.5.5.6 and manifests as a weakness in the device's security architecture that could be exploited by privileged local users to execute denial of service attacks. The vulnerability resides at the firmware level, making it particularly concerning as it operates below the operating system layer where traditional security controls might be bypassed or circumvented.
The technical implementation of this vulnerability stems from inadequate validation mechanisms within the firmware's access control system. When a privileged user gains local access to a system equipped with the affected Intel E810 network controller, they can manipulate specific firmware parameters that govern network interface behavior. This manipulation allows the attacker to disrupt normal network operations and potentially cause complete service unavailability. The flaw operates through a failure in the firmware's privilege separation mechanisms, where proper access controls are not adequately enforced during critical system operations. This represents a CWE-284 weakness, specifically related to improper access control within firmware components, and aligns with ATT&CK technique T1499.004 which focuses on network disruption through denial of service attacks.
The operational impact of this vulnerability extends beyond simple service interruption as it can compromise the reliability and availability of network infrastructure. Systems utilizing affected Intel E810 controllers may experience complete network outages, particularly in environments where these controllers serve as primary network interfaces. The local privilege requirement means that exploitation typically requires an attacker to already have elevated system access, but this access can often be gained through other attack vectors or through legitimate administrative activities. Organizations relying on Intel E810 controllers for mission-critical network operations face significant risk if this vulnerability remains unpatched, as the denial of service could affect entire network segments or data center operations.
Mitigation strategies for CVE-2021-0197 primarily center on firmware updates from Intel, specifically targeting version 1.5.5.6 or later which contain the necessary security patches. System administrators should implement comprehensive patch management procedures to ensure all affected devices receive the updated firmware as soon as possible. Additionally, organizations should consider implementing network segmentation strategies to limit the potential impact of successful exploitation, particularly in environments where multiple network controllers are deployed. Monitoring systems should be enhanced to detect unusual network behavior patterns that might indicate exploitation attempts. The vulnerability also underscores the importance of maintaining current firmware inventory and implementing regular security assessments of network infrastructure components. Organizations should also consider implementing privileged access management controls to minimize the risk of unauthorized local access to systems containing affected hardware. Compliance with industry standards such as NIST SP 800-53 and ISO/IEC 27001 becomes crucial when addressing this vulnerability, as these frameworks provide guidance on firmware security management and access control implementation.