CVE-2018-7841 Scanner

Schneider Electric U.motion Builder is utilized by companies to customize and manage automation, visualization, and control processes within various industrial settings. Primarily aimed at industrial automation, this software is often deployed in environments where seamless process control and management are imperative. The software allows users to create and maintain control interfaces with a focus on smart home and building management systems. U.motion Builder is known for enabling centralized monitoring and control, helping to integrate various systems for improved efficiency and safety. Users benefit from the flexibility it offers in tailoring automation solutions specific to their needs. Due to the integration capabilities it provides, it is commonly found in industrial complexes and large infrastructure projects.

The remote code execution vulnerability in U.motion Builder allows attackers to execute arbitrary system commands through crafted input. This flaw arises from improper input sanitization in user-supplied parameters, leading to the potential execution of malicious code on affected systems. Exploitation can be performed remotely, highlighting its severity considering the broad attack surface typical of an internet-accessible interface. It allows unauthorized users to bypass standard controls and directly interact with the system at a command level. Because of the significant privileges attackers can gain, this vulnerability ranks critically high in terms of security risk. For operators of the software, securing this vector is a high priority to maintain system integrity.

The vulnerability details include the use of specific input parameters that are not strictly checked, allowing code injection within HTTP requests. The vulnerable endpoint, /umotion/modules/reporting/track_import_export.php, is susceptible to crafted input exploited via the 'object_id' parameter. This parameter, when manipulated incorrectly, permits the execution of commands like system calls by the remote attackers. By leveraging standard network request tools, attackers can mask their inputs to appear legitimate, thus bypassing superficial security checks. The communication uses basic HTTP methods, making it easily accessible via common web probing or exploitation utilities. Attackers can subsequently orchestrate a series of commands to elevate their access or disrupt existing service flows.

The potential effects if this vulnerability is exploited include unauthorized access to system operations, complete control of affected devices, and the potential exposure or destruction of internal data. An insider understanding of network processes can be gained, manifesting into further malicious activities like data exfiltration or network espionage. Additionally, compromise at this level can facilitate lateral movement throughout the network, thereby putting other connected devices and systems at significant risk. This kind of exploit can have far-reaching effects, including business disruptions and financial loss, stemming from the necessity to debug and secure a compromised network infrastructure. Further impacts might include reputational damages depending on the severity and public perception of such a breach.

REFERENCES

• https://www.exploit-db.com/exploits/46846
• https://packetstorm.news/files/id/152862
• https://www.rcesecurity.com/2019/05/cve-2018-7841-schneider-electric-umotion-builder-remote-code-execution-0-day
• https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2017-178-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2019-071-02-Umotion-Builder.pdf