CVE-2021-1309 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-1309 on Cisco Small Business RV Series Routers due to LLDP vulnerabilities. Learn about the technical details, affected systems, and mitigation steps.
Multiple vulnerabilities have been identified in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers, potentially allowing an attacker to execute arbitrary code, leak system memory, or cause denial of service conditions.
Understanding CVE-2021-1309
This CVE involves vulnerabilities in Cisco Small Business RV Series Routers related to LLDP implementation.
What is CVE-2021-1309?
The CVE-2021-1309 relates to multiple vulnerabilities in Cisco Small Business RV Series Routers' LLDP implementation, enabling adjacent attackers to trigger arbitrary code execution, memory leaks, or device reloads. To exploit these vulnerabilities, attackers must be in the same broadcast domain as the affected device.
The Impact of CVE-2021-1309
The impact of CVE-2021-1309 is substantial, with a CVSS base score of 7.4 out of 10, indicating a high severity level. The vulnerabilities could lead to denial of service conditions on affected devices.
Technical Details of CVE-2021-1309
This section covers the technical aspects of the CVE.
Vulnerability Description
The vulnerabilities allow unauthenticated adjacent attackers to execute arbitrary code, leak system memory, or force affected routers into reloads, causing denial of service.
Affected Systems and Versions
The Cisco Small Business RV Series Router Firmware is affected, with no specific version provided.
Exploitation Mechanism
LLDP, being a Layer 2 protocol, requires attackers to be in the same broadcast domain as the affected device to exploit these vulnerabilities.
Mitigation and Prevention
Protecting against CVE-2021-1309 involves immediate actions and long-term security practices.
Immediate Steps to Take
Ensure network security by implementing segmentation and access controls to limit exposure to adjacent attackers.
Long-Term Security Practices
Regularly update firmware and implement security best practices to prevent unauthorized access and exploitation.
Patching and Updates
Stay informed about security advisories from Cisco and promptly apply patches and updates to mitigate the risks of these vulnerabilities.