CVE-2018-25039 in TCW710
Summary
by MITRE • 06/12/2022
A vulnerability was found in Thomson TCW710 ST5D.10.05. It has been declared as problematic. This vulnerability affects unknown code of the file /goform/RgUrlBlock.asp. The manipulation of the argument BasicParentalNewKeyword with the input >alert(1) as part of POST Request leads to cross site scripting (Persistent). The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 06/05/2023
This vulnerability exists in the Thomson TCW710 ST5D.10.05 device where a cross-site scripting flaw has been identified in the /goform/RgUrlBlock.asp file. The weakness specifically manifests when processing the BasicParentalNewKeyword parameter within POST requests, allowing attackers to inject malicious scripts that persist across user sessions. The vulnerability demonstrates characteristics of persistent XSS as the malicious input is stored and executed against other users who access the affected interface. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications. The attack vector requires remote exploitation since the vulnerable parameter is processed through web forms accessible over network connections.
The technical implementation of this vulnerability allows an attacker to submit a payload containing >alert(1) which gets executed when other users view the affected web interface. This persistent nature means that the malicious script remains active in the application's database or configuration storage, executing every time the vulnerable page is loaded. The vulnerability affects the device's parental control functionality where users can set keyword restrictions, making it particularly dangerous as it could be exploited to manipulate the device's security features. This attack pattern aligns with ATT&CK technique T1213.002 which covers data from information repositories, specifically targeting web application interfaces.
The operational impact of this vulnerability extends beyond simple script execution as it compromises the integrity of the device's user interface and potentially exposes sensitive configuration data. An attacker could leverage this vulnerability to redirect users to malicious sites, steal session cookies, or even gain unauthorized access to the device's administrative functions. The fact that this exploit has been publicly disclosed increases the risk significantly, as it provides attackers with a ready-made method to compromise affected devices. Organizations using these devices face potential unauthorized access to their network security controls, which could lead to broader network compromise. The vulnerability affects the device's ability to maintain secure parental controls and could allow attackers to bypass security measures designed to protect users from inappropriate content access.
Mitigation strategies should include immediate firmware updates from the vendor if available, network segmentation to isolate affected devices, and implementation of web application firewalls to filter malicious requests. Additionally, administrators should monitor network traffic for suspicious POST requests containing XSS payloads and consider disabling unnecessary web interfaces on the device. The vulnerability highlights the importance of proper input validation and output encoding in web applications, particularly in administrative interfaces where users can configure security settings. Organizations should also implement regular security assessments of network devices and maintain up-to-date vulnerability databases to identify and remediate similar issues across their infrastructure.