CVE-2021-1243 : Security Advisory and Response
Discover the impact of CVE-2021-1243, a critical vulnerability in Cisco IOS XR Software allowing unauthorized access via SNMP connections. Learn about mitigation and prevention measures.
A vulnerability in the Local Packet Transport Services (LPTS) programming of the SNMP with the management plane protection feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to allow connections despite the management plane protection
Understanding CVE-2021-1243
This CVE-2021-1243 relates to a vulnerability in Cisco IOS XR Software that could potentially allow unauthorized remote access to affected devices.
What is CVE-2021-1243?
CVE-2021-1243 is a vulnerability in the SNMP Local Packet Transport Services (LPTS) programming of Cisco IOS XR Software. It permits an attacker to connect to affected devices despite the management plane protection settings.
The Impact of CVE-2021-1243
This vulnerability could result in unauthorized access to devices via SNMP connections, compromising their security and integrity.
Technical Details of CVE-2021-1243
Cisco IOS XR Software is affected by this vulnerability, impacting its SNMP Local Packet Transport Services programming with the management plane protection feature.
Vulnerability Description
The flaw allows remote attackers to bypass the management plane protection settings and gain access to SNMP servers without proper authentication.
Affected Systems and Versions
The affected product is Cisco IOS XR Software with all versions vulnerable to this SNMP management plane protection bypass.
Exploitation Mechanism
Attackers can exploit this vulnerability by using SNMP connections to connect to affected devices, granting unauthorized access to configured SNMP ports.
Mitigation and Prevention
To safeguard against this vulnerability, users should take immediate and long-term security measures while ensuring timely patching and updates.
Immediate Steps to Take
Immediately review and update SNMP management plane protection settings to mitigate the risk of unauthorized access.
Long-Term Security Practices
Implement strict access controls, monitor SNMP activity, and regularly update security configurations.
Patching and Updates
Apply relevant security patches and updates provided by Cisco to address and rectify this vulnerability.