CVE-2020-1280 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists in the way that the Windows Bluetooth Service handles objects in memory, aka 'Windows Bluetooth Service Elevation of Privilege Vulnerability'.
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Analysis
by VulDB Data Team • 10/23/2020
The vulnerability identified as CVE-2020-1280 represents a critical elevation of privilege flaw within the Windows Bluetooth Service component. This issue stems from improper handling of memory objects by the Bluetooth service, creating a pathway for malicious actors to escalate their privileges from standard user level to system level access. The vulnerability specifically affects Windows operating systems where the Bluetooth service is enabled and running, making it particularly concerning given the widespread use of Bluetooth connectivity in modern computing environments.
From a technical perspective, the flaw manifests in the Bluetooth service's memory management routines where it fails to properly validate or sanitize object references during processing. This memory handling deficiency allows an attacker to manipulate or corrupt memory structures, potentially leading to arbitrary code execution with elevated privileges. The vulnerability is categorized under CWE-121, which deals with stack-based buffer overflow conditions, and more specifically aligns with CWE-787, representing out-of-bounds write operations. The root cause lies in insufficient input validation and memory boundary checking within the Bluetooth service's object handling mechanisms, creating a persistent security gap that can be exploited through carefully crafted malicious inputs.
The operational impact of CVE-2020-1280 extends beyond simple privilege escalation, as it can enable attackers to gain complete system control without requiring physical access or prior authentication. This vulnerability can be exploited through various attack vectors including malicious Bluetooth devices, compromised Bluetooth connections, or even through network-based exploitation in certain configurations. The implications are particularly severe in enterprise environments where Bluetooth connectivity is prevalent, as it could allow attackers to establish persistent backdoors, exfiltrate sensitive data, or deploy additional malware. Security researchers have noted that this vulnerability can be triggered remotely, making it especially dangerous for mobile devices and laptops that maintain active Bluetooth connections. The attack surface is further expanded due to the service's automatic startup and continuous operation, providing attackers with multiple opportunities for exploitation.
Mitigation strategies for CVE-2020-1280 should focus on immediate patching of affected Windows systems through Microsoft's security updates, particularly the July 2020 security updates that specifically addressed this vulnerability. Organizations should implement network segmentation to limit Bluetooth connectivity where possible and disable Bluetooth services on systems where they are not required. Additionally, monitoring for unusual Bluetooth service behavior or unauthorized device connections can help detect potential exploitation attempts. The mitigation approach aligns with ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation', and T1566, covering 'Phishing for Information', as attackers may use Bluetooth-based social engineering combined with this vulnerability. System administrators should also consider implementing application whitelisting policies to prevent unauthorized execution of Bluetooth-related utilities and ensure that the Windows Bluetooth service runs with minimal required privileges to reduce potential impact if exploitation occurs.