CVE-2021-1203 : Security Advisory and Response
Learn about CVE-2021-1203, multiple vulnerabilities in Cisco Small Business RV Series Router Firmware management interface allowing remote code execution and denial of service. Stay secure with Cisco's latest patches.
Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV Series Router Firmware could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. These vulnerabilities are due to improper validation of user-supplied input, which an attacker could exploit by sending crafted HTTP requests. Successful exploitation could lead to executing arbitrary code as the root user or causing a denial of service (DoS) condition.
Understanding CVE-2021-1203
This section delves into the details of CVE-2021-1203.
What is CVE-2021-1203?
CVE-2021-1203 highlights multiple vulnerabilities in Cisco Small Business RV Series Router Firmware's web-based management interface that could be exploited by remote attackers.
The Impact of CVE-2021-1203
The impact of these vulnerabilities includes the potential execution of arbitrary code as the root user or triggering denial of service attacks, requiring valid administrator credentials on affected devices for exploitation.
Technical Details of CVE-2021-1203
This section covers the technical aspects of CVE-2021-1203.
Vulnerability Description
The vulnerabilities stem from improper validation of user-supplied input, allowing attackers to send crafted HTTP requests to execute arbitrary code or cause DoS conditions.
Affected Systems and Versions
Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers with specific firmware versions are affected by these vulnerabilities.
Exploitation Mechanism
Attackers with valid administrator credentials can exploit these vulnerabilities by sending malicious HTTP requests to the affected devices.
Mitigation and Prevention
Here are the steps to mitigate and prevent CVE-2021-1203.
Immediate Steps to Take
Immediately update and apply patches released by Cisco to address these vulnerabilities as they become available. Ensure monitoring and network segmentation to restrict access to vulnerable devices.
Long-Term Security Practices
Regularly update firmware, implement strong password policies, restrict user access based on the principle of least privilege, and continuously monitor network traffic for suspicious activities.
Patching and Updates
Stay informed about security updates from Cisco and promptly apply patches to secure your systems against potential exploits.