CVE-2022-25621 in UNIVERGE WA 1020
Summary
by MITRE • 03/11/2022
UUNIVERGE WA 1020 Ver8.2.11 and prior, UNIVERGE WA 1510 Ver8.2.11 and prior, UNIVERGE WA 1511 Ver8.2.11 and prior, UNIVERGE WA 1512 Ver8.2.11 and prior, UNIVERGE WA 2020 Ver8.2.11 and prior, UNIVERGE WA 2021 Ver8.2.11 and prior, UNIVERGE WA 2610-AP Ver8.2.11 and prior, UNIVERGE WA 2611-AP Ver8.2.11 and prior, UNIVERGE WA 2611E-AP Ver8.2.11 and prior, UNIVERGE WA WA2612-AP Ver8.2.11 and prior allows a remote attacker to execute arbitrary OS commands.
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Analysis
by VulDB Data Team • 03/14/2022
The vulnerability identified as CVE-2022-25621 affects multiple models within the UUNIVERGE WA series of network appliances, specifically versions 8.2.11 and earlier across various hardware platforms including WA 1020, WA 1510, WA 1511, WA 1512, WA 2020, WA 2021, WA 2610-AP, WA 2611-AP, WA 2611E-AP, and WA2612-AP. This represents a critical remote code execution flaw that enables attackers to execute arbitrary operating system commands on affected devices without requiring authentication. The vulnerability stems from inadequate input validation and sanitization mechanisms within the web interface of these network appliances, creating an attack surface that allows malicious actors to inject and execute OS commands remotely. The affected systems operate on embedded operating systems and typically serve as network infrastructure devices handling voice and data communications within enterprise environments.
This security flaw manifests as a command injection vulnerability, specifically categorized under CWE-77 which defines improper neutralization of special elements used in a command. The vulnerability allows attackers to manipulate input fields within the web-based management interface to inject malicious commands that are then executed by the underlying operating system. The attack vector requires no authentication credentials, making it particularly dangerous as it can be exploited from any network location. The vulnerability exists in the processing of user-supplied input through HTTP requests, where commands are directly passed to system execution functions without proper validation or sanitization. This type of vulnerability is classified under the ATT&CK framework as T1059.001 - Command and Scripting Interpreter, specifically focusing on the execution of OS commands through web interfaces. The impact is amplified by the fact that these appliances typically operate with elevated privileges, meaning successful exploitation could provide attackers with root-level access to the network infrastructure devices.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete compromise of affected network infrastructure. Attackers could potentially gain unauthorized access to voice and data communications systems, manipulate network configurations, redirect traffic, or establish persistent backdoors within enterprise networks. The vulnerability affects devices that serve as critical communication infrastructure, making them attractive targets for adversaries seeking to disrupt business operations or establish long-term network presence. Organizations relying on these appliances for their network infrastructure may face significant security risks including data exfiltration, service disruption, and potential lateral movement within their network environments. The vulnerability's presence in multiple hardware models suggests a systemic issue within the software architecture of these network appliances, potentially affecting numerous enterprise deployments across various industries. The lack of authentication requirements means that exploitation can occur at scale without the need for credential compromise, making detection and mitigation more challenging for security teams.
Mitigation strategies for CVE-2022-25621 should prioritize immediate firmware updates from the vendor to address the command injection vulnerability. Organizations should implement network segmentation to limit access to these appliances, particularly restricting web management interfaces from external network access. Network monitoring should be enhanced to detect suspicious command execution patterns and unusual traffic patterns originating from affected devices. Security teams should conduct comprehensive vulnerability assessments to identify all instances of affected hardware within their network infrastructure and implement temporary network access controls. The implementation of web application firewalls and intrusion detection systems can help detect and block malicious command injection attempts. Additionally, organizations should review and restrict administrative access to these appliances, implementing principle of least privilege access controls and multi-factor authentication where possible. Regular security audits of network infrastructure devices should be conducted to identify similar vulnerabilities and ensure that all systems remain up to date with the latest security patches. The vulnerability highlights the importance of secure coding practices and input validation in network appliance software development, emphasizing the need for robust security testing throughout the software development lifecycle.