CVE-2020-7863 in RAON K
Summary
by MITRE • 08/06/2021
A vulnerability in File Transfer Solution of Raonwiz could allow arbitrary command execution as the result of viewing a specially-crafted web page. This vulnerability is due to insufficient validation of the parameter of the specific method. An attacker could exploit this vulnerability by setting the parameter to the command they want to execute. A successful exploit could allow the attacker to execute arbitrary commands on a target system as the user. However, the victim must run the Internet Explorer browser with administrator privileges because of the cross-domain policy.
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Analysis
by VulDB Data Team • 08/10/2021
The vulnerability identified as CVE-2020-7863 resides within Raonwiz's File Transfer Solution, representing a critical security flaw that enables remote arbitrary command execution through web page manipulation. This weakness specifically targets the application's insufficient input validation mechanisms, particularly concerning a particular method's parameter handling. The vulnerability operates under the framework of CWE-74, which addresses improper neutralization of special elements used in data queries, and aligns with ATT&CK technique T1059.001 for command and script interpreter execution. The flaw manifests when a maliciously crafted web page is viewed, allowing an attacker to inject and execute arbitrary commands on the target system, effectively bypassing normal security boundaries.
The technical exploitation mechanism relies on parameter manipulation within a specific method call, where the application fails to properly validate or sanitize user-supplied input. When an attacker crafts a web page containing malicious parameters, the File Transfer Solution processes these inputs without adequate validation, directly incorporating them into system commands. This represents a classic command injection vulnerability that allows for complete system compromise when successfully exploited. The vulnerability requires specific conditions for successful exploitation, including the victim's use of Internet Explorer browser with administrator privileges. This prerequisite stems from the browser's cross-domain policy restrictions that normally prevent such attacks, but when executed with elevated privileges, these protections become ineffective.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it enables full system compromise through arbitrary command execution. Attackers can leverage this vulnerability to install malware, modify system configurations, steal sensitive data, or establish persistent backdoors on affected systems. The requirement for administrator privileges in Internet Explorer creates a specific attack vector that aligns with ATT&CK technique T1068 for local privilege escalation and T1548.001 for abuse of system privileges. Organizations running Raonwiz File Transfer Solution are particularly vulnerable, as this flaw can be exploited remotely through web-based attacks without requiring physical access to the target system. The cross-domain policy limitation means that attackers must either trick users into visiting malicious pages or exploit other vulnerabilities to gain the necessary privileges for successful exploitation.
Mitigation strategies for CVE-2020-7863 should focus on immediate patching of the File Transfer Solution software, as provided by Raonwiz, to address the insufficient input validation. Organizations should implement network segmentation and access controls to limit exposure to potentially malicious web content, particularly in environments where Internet Explorer is still in use. Browser hardening measures including disabling unnecessary features and implementing strict content security policies can reduce the attack surface. Additionally, monitoring for suspicious command execution patterns and implementing web application firewalls can help detect and prevent exploitation attempts. The vulnerability's classification under CWE-74 and its alignment with ATT&CK techniques emphasize the need for comprehensive input validation controls and privileged access monitoring. Security teams should also consider implementing user education programs to prevent social engineering attacks that might lead users to visit malicious web pages, as the exploitation requires user interaction with compromised content.