CVE-2021-1156 Explained : Impact and Mitigation
Learn about CVE-2021-1156, addressing cross-site scripting vulnerabilities in Cisco Small Business RV Series Routers. Understand the impact, technical details, and mitigation strategies.
This CVE-2021-1156 advisory addresses multiple vulnerabilities in the web-based management interface of Cisco Small Business RV Series Routers. An authenticated remote attacker could exploit these vulnerabilities for cross-site scripting attacks.
Understanding CVE-2021-1156
This CVE involves cross-site scripting vulnerabilities in Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers, allowing attackers to execute arbitrary script code.
What is CVE-2021-1156?
The vulnerabilities in the web interface of the affected routers enable attackers with valid admin credentials to perform cross-site scripting attacks, potentially leading to unauthorized access to sensitive information.
The Impact of CVE-2021-1156
If successfully exploited, attackers could execute malicious scripts within the router's interface context, compromising user sessions and sensitive data stored in the browser.
Technical Details of CVE-2021-1156
This section provides insights into the vulnerability's description, affected systems, versions, and the exploitation mechanism.
Vulnerability Description
The web-based management interface of Cisco Small Business RV Series Routers lacks proper input validation, allowing attackers to inject and execute malicious scripts through crafted HTTP requests.
Affected Systems and Versions
The vulnerabilities impact Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers, across all versions.
Exploitation Mechanism
To exploit CVE-2021-1156, attackers need valid administrator credentials to send crafted HTTP requests and execute malicious scripts.
Mitigation and Prevention
Discover the immediate steps to take to mitigate the risks posed by CVE-2021-1156, along with long-term security practices and the importance of patching and updates.
Immediate Steps to Take
Users are advised to restrict access to the affected devices, monitor network traffic, and follow vendor recommendations for secure configurations.
Long-Term Security Practices
Implement network segmentation, regularly update firmware, educate users on phishing awareness, and deploy intrusion detection systems for enhanced security.
Patching and Updates
Apply patches provided by the vendor, Cisco, to address the vulnerabilities in the web interface of the affected routers.