CVE-2021-35482 in MirrorOp Windows Sender
Summary
by MITRE • 07/22/2021
An issue was discovered in Barco MirrorOp Windows Sender before 2.5.4.70. An attacker in the local network is able to achieve Remote Code Execution (with user privileges of the local user) on any device that tries to connect to a WePresent presentation system.
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Analysis
by VulDB Data Team • 07/26/2021
The vulnerability identified as CVE-2021-35482 represents a critical remote code execution flaw within Barco MirrorOp Windows Sender software versions prior to 2.5.4.70. This security weakness specifically affects devices that attempt to connect to WePresent presentation systems, creating a significant attack surface for malicious actors within local network environments. The vulnerability stems from inadequate input validation and authentication mechanisms within the Windows Sender component that facilitates presentation sharing functionality.
The technical implementation of this flaw allows an attacker positioned within the same local network segment to exploit the communication protocols used by the MirrorOp sender to establish connections with WePresent systems. When a vulnerable Windows Sender attempts to connect to a presentation system, the attacker can manipulate the connection process to inject malicious code that executes with the privileges of the local user account. This represents a classic privilege escalation scenario where network-based attacks can leverage the trust relationship between presentation devices to gain unauthorized execution capabilities.
From an operational impact perspective, this vulnerability creates a severe risk for enterprise environments where presentation systems are commonly used in meeting rooms, training facilities, and collaborative workspaces. The attack vector requires only local network access, making it particularly dangerous as it can be exploited from within the corporate network perimeter. Organizations utilizing Barco MirrorOp systems face potential data breaches, system compromise, and lateral movement opportunities for attackers who can establish persistent access through this vulnerability. The execution occurs with user privileges rather than administrative rights, but this still provides attackers with significant operational capabilities including credential theft, data exfiltration, and system reconnaissance.
The vulnerability aligns with CWE-20, which addresses improper input validation in software systems, and demonstrates characteristics consistent with ATT&CK technique T1059.001 for command and scripting interpreter execution. Network-based exploitation of presentation systems represents a growing concern in enterprise security as these devices often lack robust security controls and are frequently deployed in accessible locations. Organizations should implement immediate patch management procedures to upgrade to Barco MirrorOp Windows Sender version 2.5.4.70 or later, which includes proper authentication and input validation controls. Network segmentation strategies should be employed to isolate presentation systems from critical network segments, and regular security assessments should be conducted to identify other potentially vulnerable endpoints within the organization's infrastructure.
Additional mitigations include implementing network access controls to restrict communication between presentation systems and other network devices, monitoring for unusual connection patterns to WePresent systems, and establishing incident response procedures for potential exploitation attempts. Security teams should also consider deploying endpoint detection and response solutions that can identify suspicious execution patterns associated with this type of vulnerability. The remediation process must include comprehensive testing of patched systems to ensure that the vulnerability has been properly addressed without introducing compatibility issues with existing presentation workflows.