CVE-2021-27780 in BigFix Mobile
Summary
by MITRE • 05/27/2022
The software may be vulnerable to both Un-Auth XML interaction and unauthenticated device enrollment.
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Analysis
by VulDB Data Team • 06/01/2022
The vulnerability identified as CVE-2021-27780 represents a critical security flaw that exposes systems to unauthorized XML interactions and device enrollment processes. This weakness manifests in software implementations that fail to properly authenticate users before allowing XML-based communications or device registration procedures. The vulnerability stems from inadequate access control mechanisms that permit any external entity to initiate XML interactions or enroll devices without proper verification of credentials or authorization status.
The technical nature of this flaw aligns with CWE-287 which addresses improper authentication issues, and CWE-352 which covers cross-site request forgery vulnerabilities. When exploited, this vulnerability enables attackers to perform unauthorized device enrollment operations and manipulate XML data exchanges without requiring valid authentication credentials. The flaw exists at the protocol level where XML parsing and device management interfaces lack proper authentication checks, creating an attack surface that adversaries can leverage to gain unauthorized access to networked devices.
From an operational perspective, this vulnerability poses significant risks to enterprise environments where device management and XML-based communication systems are prevalent. Attackers can exploit the unauthenticated XML interaction capability to inject malicious payloads, manipulate device configurations, or establish persistent access points within network infrastructure. The unauthenticated device enrollment aspect particularly threatens IoT ecosystems and mobile device management platforms where device registration processes are critical for maintaining security boundaries and access controls.
The impact of exploitation extends beyond immediate unauthorized access to include potential lateral movement within networks, data exfiltration capabilities, and establishment of persistent backdoors. This vulnerability particularly affects systems that rely on XML-based protocols for device communication and management, including enterprise mobility management solutions, industrial control systems, and network device configuration interfaces. Security professionals should consider this weakness in the context of ATT&CK technique T1078 which covers valid accounts and T1566 which covers credential harvesting through social engineering.
Mitigation strategies should focus on implementing robust authentication mechanisms for all XML interaction endpoints and device enrollment processes. Organizations must ensure that all XML parsing functions require proper authentication tokens or certificates before processing requests. Network segmentation and access control lists should be deployed to limit exposure of vulnerable endpoints, while regular security audits should verify that authentication controls remain effective. Additionally, implementing monitoring solutions that detect unusual device enrollment patterns or unauthorized XML interactions can provide early warning capabilities for potential exploitation attempts. The remediation process should include code reviews to identify all XML interaction points and device enrollment interfaces that require authentication validation, ensuring that security controls are properly implemented across all system components.