CVE-2018-7785 in U.motion Builder
Summary
by MITRE
In Schneider Electric U.motion Builder software versions prior to v1.3.4, a remote command injection allows authentication bypass.
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Analysis
by VulDB Data Team • 02/25/2020
The vulnerability identified as CVE-2018-7785 affects Schneider Electric U.motion Builder software versions prior to v1.3.4 and represents a critical remote command injection flaw that enables authentication bypass. This vulnerability resides within the software's handling of user input and command execution processes, creating a pathway for malicious actors to execute arbitrary commands on the affected system without proper authentication. The flaw fundamentally undermines the software's security model by allowing unauthorized access through command injection techniques that circumvent normal authentication mechanisms.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the U.motion Builder software's command processing subsystem. When legitimate users submit commands or parameters to the system, the software fails to properly validate or sanitize these inputs before executing them within the operating system context. This weakness creates a classic command injection scenario where attacker-controlled input can be interpreted and executed as system commands, effectively allowing remote code execution capabilities. The vulnerability specifically targets the authentication bypass mechanism, enabling attackers to gain unauthorized access to the system by injecting malicious commands that manipulate the authentication flow.
The operational impact of CVE-2018-7785 extends beyond simple unauthorized access, as it can lead to complete system compromise and potential lateral movement within network environments. Attackers exploiting this vulnerability can execute arbitrary commands with the privileges of the affected application, potentially leading to data exfiltration, system modification, or deployment of additional malware. The remote nature of the vulnerability means that attackers can exploit it from anywhere on the network, making it particularly dangerous in industrial control environments where Schneider Electric U.motion Builder is commonly deployed. This vulnerability directly impacts the integrity and availability of industrial automation systems, potentially causing operational disruptions and safety concerns.
Security professionals should implement immediate mitigations including updating to Schneider Electric U.motion Builder version 1.3.4 or later, which contains patches addressing the command injection vulnerability. Network segmentation and access controls should be strengthened to limit exposure of affected systems, while monitoring solutions should be configured to detect suspicious command execution patterns. The vulnerability aligns with CWE-77 and CWE-287 categories, representing command injection and authentication bypass weaknesses respectively, and maps to ATT&CK techniques including T1059 for command and scripting interpreter and T1078 for valid accounts. Organizations should also conduct thorough vulnerability assessments to identify any other systems running affected software versions and ensure proper patch management processes are in place to prevent similar vulnerabilities from emerging in the future.