CVE-2017-20082 in Smart Visu Server
Summary
by MITRE • 06/22/2022
A vulnerability, which was classified as problematic, has been found in JUNG Smart Visu Server 1.0.804/1.0.830/1.0.832. This issue affects some unknown processing. The manipulation leads to backdoor. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used. Upgrading to version 1.0.900 is able to address this issue. It is recommended to upgrade the affected component.
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Analysis
by VulDB Data Team • 11/14/2022
The vulnerability identified as CVE-2017-20082 represents a critical backdoor access point within JUNG Smart Visu Server versions 1.0.804, 1.0.830, and 1.0.832. This security flaw falls under the CWE-862 category of "Missing Authorization" and demonstrates a fundamental failure in the server's authentication mechanisms. The vulnerability manifests during the processing of specific input parameters that allow unauthorized local access to the system, effectively creating a persistent backdoor that can be exploited by malicious actors with physical access to the device or those who have already gained local system privileges.
The technical implementation of this backdoor vulnerability appears to stem from improper access control validation within the server's processing logic. When the affected JUNG Smart Visu Server receives certain malformed or specially crafted input sequences, it fails to properly authenticate the requesting entity and instead grants elevated privileges or direct access to system functions. This represents a classic example of a privilege escalation vulnerability that operates at the local system level rather than over network protocols, making it particularly concerning for environments where physical security cannot be guaranteed. The attack vector requires only local access to the system, meaning that an attacker who has already compromised the physical device or gained local user access can exploit this vulnerability to achieve unauthorized system control.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with persistent backdoor capabilities that can be used for data exfiltration, system compromise, and continued unauthorized access even after initial exploitation attempts. This type of vulnerability is particularly dangerous in industrial control systems or smart building environments where JUNG Smart Visu Server may be deployed, as it could enable attackers to manipulate critical infrastructure controls or access sensitive operational data. The public disclosure of the exploit means that threat actors with basic technical knowledge can leverage this vulnerability without requiring advanced exploitation skills, significantly increasing the risk to affected organizations. The vulnerability's classification as a local attack means that network-based protections alone will not prevent exploitation, requiring physical security measures and proper system hardening.
Mitigation of this vulnerability requires immediate implementation of the vendor-recommended upgrade to version 1.0.900, which contains the necessary patches to address the backdoor access mechanism. Organizations should also implement comprehensive access control policies, including regular security audits of local system access, implementation of proper user privilege management, and monitoring for unauthorized system access attempts. The remediation process should include thorough vulnerability scanning to identify all affected devices within the network infrastructure, followed by systematic patch deployment and verification. Additionally, network segmentation and the implementation of host-based intrusion detection systems can provide additional layers of protection against potential exploitation attempts, particularly in environments where physical security controls may be insufficient. Organizations should also consider implementing security awareness training for personnel who have physical access to these systems to prevent accidental exploitation through social engineering or insider threats.