Improper Input Validation in RDK-B WebUI Leading to DoS

Executive Summary

This vulnerability is an improper input validation flaw in the RDK-B WebUI component. It exists in the file ajaxSet_wireless_network_configuration.jst and is triggered by a crafted ssid_number parameter. An authenticated attacker can exploit this to cause a denial of service condition.

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Detection Guidance

This vulnerability involves improper input validation in RDK-B WebUI's wireless network configuration. To detect it, inspect network logs for unusual `ssid_number` parameter values in requests to `ajaxSet_wireless_network_configuration.jst`. Monitor for denial of service symptoms like service unavailability or crashes.

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Impact Analysis

If you use the affected RDK-B WebUI version, an attacker with valid credentials could send a maliciously crafted request to disrupt wireless network configuration services. This may lead to temporary unavailability of network management features.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it involves an authenticated denial of service via improper input validation in a specific RDK-B WebUI component. No evidence suggests it leads to unauthorized data access or processing violations.

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Mitigation Strategies

Update the RDK-B WebUI to a patched version. Remove or restrict access to the vulnerable file ajaxSet_wireless_network_configuration.jst. Monitor network traffic for unusual SSID parameter manipulation attempts.

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