CVE-2022-23136 in ZXHN F680
Summary
by MITRE • 03/30/2022
There is a stored XSS vulnerability in ZTE home gateway product. An attacker could modify the gateway name by inserting special characters and trigger an XSS attack when the user views the current topology of the device through the management page.
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Analysis
by VulDB Data Team • 04/02/2022
The stored cross-site scripting vulnerability identified as CVE-2022-23136 affects ZTE home gateway devices, representing a critical security flaw that enables persistent malicious code execution within user browser environments. This vulnerability resides in the device management interface where the gateway name field accepts user input without proper sanitization or validation mechanisms. The flaw allows attackers to inject malicious scripts that persist in the device's configuration and execute whenever users access the topology visualization feature through the web management console. The vulnerability specifically manifests when administrators or users navigate to the device topology page, which dynamically renders the gateway name field, thereby triggering the stored XSS payload.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the ZTE gateway's web interface. When users modify the gateway name through the management portal, the system fails to properly sanitize special characters and script tags that may be embedded within the input. This weakness creates a persistent storage point for malicious payloads that remain dormant until accessed through the topology viewing functionality. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws where untrusted data is improperly integrated into web pages without adequate sanitization. The attack vector operates through the web-based management interface, making it accessible to remote attackers who can leverage this flaw to execute arbitrary code within the context of the user's browser session.
The operational impact of CVE-2022-23136 extends beyond simple script execution, as it provides attackers with potential access to sensitive network information and the ability to perform malicious actions on behalf of authenticated users. Once successfully exploited, the stored XSS payload can steal session cookies, redirect users to malicious sites, or inject additional malicious scripts that could compromise the entire network infrastructure. This vulnerability particularly affects home gateway environments where users may have elevated privileges within their local network, potentially enabling attackers to escalate their access and gain deeper insights into network topology, connected devices, and communication patterns. The persistent nature of stored XSS means that any user who accesses the affected management interface could be compromised, regardless of whether they are administrators or regular users, creating a widespread attack surface.
Mitigation strategies for CVE-2022-23136 should prioritize immediate firmware updates from ZTE to address the root cause of the vulnerability. Network administrators must implement strict input validation measures at all user-facing interfaces, ensuring that all user-supplied data undergoes proper sanitization before being stored or rendered in web pages. The implementation of Content Security Policy headers and proper output encoding techniques can significantly reduce the risk of XSS exploitation even if input validation fails. Security monitoring should include detection of unusual gateway name modifications and potential script injection attempts within the management interface. Organizations should also consider network segmentation and access controls to limit exposure of management interfaces to trusted users only, while implementing regular security assessments to identify similar vulnerabilities in network infrastructure devices. This vulnerability demonstrates the importance of applying security patches promptly and maintaining awareness of industry-standard security frameworks such as those defined in the ATT&CK framework under the web application attack patterns, specifically focusing on client-side attack vectors that can persist across user sessions.