CVE-2021-1211 Explained : Impact and Mitigation
Learn about CVE-2021-1211 affecting Cisco Small Business RV series routers due to vulnerabilities in the web-based management interface. Understand the impact, technical details, and mitigation steps.
Cisco Small Business RV Series Router Firmware is affected by multiple vulnerabilities in the web-based management interface, allowing a remote attacker to execute arbitrary code or cause an unexpected device restart.
Understanding CVE-2021-1211
This CVE refers to vulnerabilities in the web-based management interface of Cisco Small Business RV series routers.
What is CVE-2021-1211?
The vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could enable a remote attacker to execute arbitrary code or trigger an unexpected device restart.
The Impact of CVE-2021-1211
The vulnerabilities could lead to a denial of service (DoS) condition or an attacker gaining root access on the underlying OS, posing a high impact on confidentiality, integrity, and availability.
Technical Details of CVE-2021-1211
The vulnerabilities are attributed to improper validation of user inputs in the web-based management interface, potentially allowing attackers to exploit the flaws by sending crafted HTTP requests.
Vulnerability Description
The vulnerabilities could be exploited by sending malicious requests, leading to arbitrary code execution or device reload.
Affected Systems and Versions
Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers are affected by these vulnerabilities.
Exploitation Mechanism
Attackers need valid administrator credentials to exploit these vulnerabilities through crafted HTTP requests.
Mitigation and Prevention
Steps need to be taken promptly to address and prevent the exploitation of these vulnerabilities.
Immediate Steps to Take
It is recommended to restrict network access to the web-based management interface and monitor for any unusual activities.
Long-Term Security Practices
Regularly update firmware and ensure strong, unique administrator credentials to enhance system security.
Patching and Updates
Cisco is yet to release software updates addressing these vulnerabilities, users should stay vigilant and apply patches as soon as they are available.