CVE-2022-20890 : What You Need to Know

Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers are affected by multiple vulnerabilities in their web-based management interface. These vulnerabilities could allow an authenticated remote attacker to execute arbitrary code or cause a denial of service on the affected devices.

Understanding CVE-2022-20890

This CVE involves multiple vulnerabilities in Cisco Small Business RV Series Router Firmware, potentially allowing attackers to execute arbitrary commands or trigger unexpected device restarts.

What is CVE-2022-20890?

The vulnerabilities in the web-based management interface of Cisco Small Business RV Series Routers could be exploited by remote attackers with valid Administrator credentials to execute arbitrary commands with root-level privileges or cause a denial of service by restarting the device unexpectedly.

The Impact of CVE-2022-20890

If successfully exploited, these vulnerabilities could lead to unauthorized code execution or denial of service conditions, posing a serious risk to the security and availability of the affected devices.

Technical Details of CVE-2022-20890

These are the specifics of the vulnerability:

Vulnerability Description

The vulnerabilities are a result of insufficient validation of user fields within incoming HTTP packets, allowing attackers to send crafted requests to the web-based management interface.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers with valid Administrator credentials can exploit these vulnerabilities by sending crafted requests to the management interface to execute arbitrary commands or initiate denial of service conditions.

Mitigation and Prevention

To address CVE-2022-20890, consider the following steps:

Immediate Steps to Take

Monitor Cisco's security advisories for software updates that address these vulnerabilities.

Long-Term Security Practices

Implement strong security measures, including regular security assessments and audits.
Restrict network access to authorized personnel only.

Patching and Updates

Apply software updates and patches from Cisco once they are released to mitigate the risks associated with these vulnerabilities.