CVE-2020-22158 in RX8200
Summary
by MITRE
Ericsson RX8200 5.13.3 devices are vulnerable to multiple reflected and stored XSS. An attacker has to inject JavaScript code directly in the "path" or "Services+ID" parameters and send the URL to a user in order to exploit reflected XSS. In the case of stored XSS, an attacker must modify the "name" parameter with the malicious code.
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Analysis
by VulDB Data Team • 09/14/2020
The CVE-2020-22158 vulnerability affects Ericsson RX8200 5.13.3 network devices, representing a critical security flaw that exposes these systems to cross-site scripting attacks. This vulnerability manifests through two distinct attack vectors: reflected and stored cross-site scripting, both of which can compromise the security of web interfaces accessible to users interacting with these network devices. The vulnerability stems from insufficient input validation and output sanitization within the device's web management interface, creating exploitable entry points for malicious actors seeking to execute unauthorized code within the context of authenticated user sessions.
The technical implementation of this vulnerability involves specific parameter manipulation within the device's web interface. For reflected cross-site scripting attacks, an attacker must inject malicious JavaScript code directly into either the "path" or "Services+ID" parameters of the web application. When a victim clicks on a crafted URL containing this malicious payload, the web application reflects the injected script back to the user's browser, executing the malicious code within the victim's session context. This attack requires social engineering to deliver the malicious URL to unsuspecting users, making it particularly dangerous in environments where users may be targeted through phishing campaigns or other deceptive means. For stored cross-site scripting exploitation, attackers must modify the "name" parameter with malicious code, which gets permanently stored within the device's database or configuration storage. This stored payload then executes whenever the affected parameter is rendered in subsequent web interface interactions, making it more persistent and potentially more damaging than reflected XSS attacks.
The operational impact of CVE-2020-22158 extends beyond simple code execution, as it provides attackers with the capability to impersonate legitimate users, access sensitive device configurations, and potentially escalate privileges within the network infrastructure. The vulnerability affects the web management interface of the RX8200 devices, which serves as the primary means for network administrators to configure and monitor these critical network components. Successful exploitation could allow attackers to view or modify device settings, access confidential network information, or redirect traffic through maliciously configured routing parameters. This represents a significant risk to network security posture, particularly in enterprise environments where these devices may be directly exposed to untrusted network segments or where administrative access is not adequately segmented from general user access.
Security professionals should consider this vulnerability in the context of CWE-79, which specifically addresses cross-site scripting flaws in software applications. The ATT&CK framework categorizes this as a technique for code injection and privilege escalation, with potential for lateral movement within network environments. Mitigation strategies should include immediate firmware updates from Ericsson to address the identified vulnerabilities, implementation of web application firewalls to filter malicious payloads, and network segmentation to limit exposure of these management interfaces. Additionally, organizations should conduct thorough security assessments of their network infrastructure to identify other potentially vulnerable devices and implement comprehensive monitoring for suspicious activities related to these specific parameters. The vulnerability highlights the importance of proper input validation and output encoding in web applications, particularly those managing critical network infrastructure components.