CVE-2019-7419 in X7400GX Syncthru
Summary
by MITRE
XSS exists in SAMSUNG X7400GX SyncThru Web Service V6.A6.25 V11.01.05.25_08-21-2015 in "/sws/leftmenu.sws" in multiple parameters: ruiFw_id, ruiFw_pid, ruiFw_title.
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Analysis
by VulDB Data Team • 08/04/2023
The vulnerability identified as CVE-2019-7419 represents a cross-site scripting flaw within the Samsung X7400GX SyncThru Web Service version 6.A6.25 V11.01.05.25_08-21-2015. This web-based service interface provides remote management capabilities for Samsung multifunction devices and is susceptible to malicious input manipulation through specific parameters in the leftmenu.sws endpoint. The vulnerability specifically affects three parameters: ruiFw_id, ruiFw_pid, and ruiFw_title, which are processed without adequate sanitization or output encoding, creating an avenue for attackers to inject malicious scripts into the web application's response. The affected device model X7400GX is a multifunction printer that exposes this web service interface for remote administration purposes, making it accessible over the network and potentially vulnerable to exploitation by unauthorized users.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the SyncThru web service framework. When user-supplied parameters are directly incorporated into the web response without proper sanitization, attackers can craft malicious payloads that execute within the context of other users' browsers. The parameters ruiFw_id, ruiFw_pid, and ruiFw_title appear to be used for identifying firmware components, process identifiers, and titles respectively, but they are not properly escaped or validated before being rendered in the web interface. This failure aligns with CWE-79, which describes cross-site scripting vulnerabilities where untrusted data is incorporated into web pages without proper validation or encoding. The vulnerability exists at the application layer and requires no special privileges to exploit, as it operates through the standard web interface that may be accessible to network users.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with potential access to sensitive device information and functionality. An attacker could leverage this XSS vulnerability to steal session cookies, redirect users to malicious sites, or inject persistent scripts that could compromise user sessions. The vulnerability affects the web-based management interface of the device, potentially allowing unauthorized individuals to gain insights into the device's configuration, firmware details, and operational state. In enterprise environments where these devices are connected to internal networks, this vulnerability could serve as a foothold for further attacks, potentially enabling lateral movement or privilege escalation. The attack surface is particularly concerning given that the affected device is a network-connected multifunction printer, which often operates with elevated privileges and may have access to sensitive network resources.
Mitigation strategies for this vulnerability should focus on both immediate remediation and long-term security hardening measures. The most effective immediate solution involves updating the SyncThru web service firmware to a version that properly sanitizes input parameters and implements proper output encoding for all user-supplied data. Organizations should also implement network segmentation to restrict access to these management interfaces, ensuring that only authorized administrative users can reach the device's web service. Input validation should be strengthened by implementing strict parameter validation and output encoding mechanisms for all parameters that are incorporated into web responses. Additionally, organizations should consider implementing web application firewalls or security monitoring tools that can detect and block suspicious requests targeting these specific parameters. This vulnerability demonstrates the importance of following secure coding practices and adheres to ATT&CK technique T1212, which involves exploitation of web application vulnerabilities for privilege escalation or data exfiltration purposes. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other networked devices and applications within the organization's infrastructure.