CVE-2022-20873 : Security Advisory and Response

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV Series routers could allow an authenticated attacker to execute arbitrary code or cause a denial of service (DoS) condition.

Understanding CVE-2022-20873

This CVE refers to a series of vulnerabilities in Cisco Small Business RV Series routers that could be exploited by an authenticated attacker to execute arbitrary code or disrupt the device's operation.

What is CVE-2022-20873?

The vulnerabilities arise from insufficient validation of user fields in HTTP packets, allowing malicious actors to send crafted requests to the management interface and gain root-level privileges or trigger unexpected restarts on affected devices.

The Impact of CVE-2022-20873

An attacker with valid Administrator credentials can exploit these vulnerabilities to execute arbitrary commands with elevated privileges or induce a DoS condition by restarting the device unexpectedly. Cisco is yet to release updates addressing these vulnerabilities.

Technical Details of CVE-2022-20873

The following technical details provide more insights into the CVE.

Vulnerability Description

The vulnerabilities stem from inadequate validation of user inputs in HTTP packets, enabling attackers to execute arbitrary code or disrupt device operations.

Affected Systems and Versions

Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers are affected by these vulnerabilities.

Exploitation Mechanism

Attackers can exploit these vulnerabilities by sending specially crafted requests to the web-based management interface, requiring valid Administrator credentials.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices can help mitigate the risks associated with CVE-2022-20873.

Immediate Steps to Take

Ensure the secure management of devices, restrict access to critical interfaces, and monitor for any unusual activities that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update device firmware, apply security patches promptly, enforce strong authentication mechanisms, and conduct security audits to identify and address vulnerabilities.

Patching and Updates

Stay informed about software updates from Cisco and apply patches as soon as they are available to address the vulnerabilities and enhance the security posture of the affected devices.