CVE-2017-5859 in cnPilot R200
Summary
by MITRE
On Cambium Networks cnPilot R200/201 devices before 4.3, there is a vulnerability involving the certificate of the device and its RSA keys, aka RBN-183.
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Analysis
by VulDB Data Team • 09/05/2020
The vulnerability identified as CVE-2017-5859 affects Cambium Networks cnPilot R200/201 wireless access points running firmware versions prior to 4.3. This weakness resides in the device's certificate management and RSA key implementation, creating a significant security risk for networks utilizing these specific hardware models. The issue represents a critical flaw in the device's cryptographic infrastructure that undermines the integrity and confidentiality of communications.
The technical flaw manifests in the improper handling of RSA keys and digital certificates within the cnPilot R200/201 devices. This vulnerability allows attackers to potentially extract or manipulate the device's cryptographic keys, which are essential for establishing secure connections and authenticating communications. The weakness stems from inadequate key generation processes and insufficient certificate management protocols that fail to meet industry standards for cryptographic security. According to CWE classification, this vulnerability maps to CWE-327, which addresses broken or weak cryptography, specifically focusing on the use of insecure cryptographic algorithms and key management practices.
The operational impact of this vulnerability extends beyond simple network security concerns to encompass potential full device compromise and unauthorized access to network resources. An attacker who successfully exploits this weakness could gain persistent access to the affected devices, potentially leading to man-in-the-middle attacks, data interception, or even complete network takeover. The vulnerability affects the device's ability to maintain secure communications, making it susceptible to various attack vectors including certificate forgery and cryptographic key extraction. This issue directly aligns with ATT&CK technique T1552.001, which involves the use of credential dumping and key extraction techniques to compromise system security.
Organizations utilizing Cambium Networks cnPilot R200/201 devices should prioritize immediate firmware updates to version 4.3 or later, which contains the necessary patches to address this cryptographic weakness. Additionally, network administrators should conduct comprehensive inventory assessments to identify all affected devices within their infrastructure and implement monitoring protocols to detect potential exploitation attempts. The remediation process should include certificate revocation for any compromised devices and reissuance of valid certificates to maintain secure communications. Security teams should also consider implementing network segmentation and enhanced monitoring to limit the potential impact of any successful exploitation attempts, while ensuring that all devices maintain proper cryptographic hygiene through regular security assessments and updates.