CVE-2021-1220 : What You Need to Know
Learn about CVE-2021-1220, multiple vulnerabilities in Cisco IOS XE Software web UI that allow DoS attacks. Find out impact, mitigation steps, affected systems & exploitation method.
Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to launch a denial of service (DoS) attack. The attacker with read-only privileges could cause the web UI software to become unresponsive and consume all available vty lines, resulting in a DoS condition.
Understanding CVE-2021-1220
This CVE involves vulnerabilities in Cisco IOS XE Software that can be exploited by a remote attacker with read-only privileges to trigger a DoS attack by causing the web UI software to become unresponsive.
What is CVE-2021-1220?
The CVE-2021-1220 relates to multiple vulnerabilities in the web UI of Cisco IOS XE Software that could allow a remote attacker with read-only privileges to launch a DoS attack by consuming vty lines.
The Impact of CVE-2021-1220
These vulnerabilities, arising from insufficient error handling in the web UI, can lead to a complete denial of service condition on the affected device. An attacker could potentially render the web UI software unresponsive, hindering session establishment.
Technical Details of CVE-2021-1220
This section provides insights into the vulnerability description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerabilities in the web UI of Cisco IOS XE Software can be exploited by sending crafted HTTP packets to the affected device, resulting in the software becoming unresponsive and consuming vty lines, thereby impeding session creation.
Affected Systems and Versions
The vulnerability impacts Cisco IOS XE Software.
Exploitation Mechanism
An attacker could exploit these vulnerabilities by sending specially crafted HTTP packets to trigger the DoS attack.
Mitigation and Prevention
To address CVE-2021-1220, immediate steps and long-term security measures are crucial.
Immediate Steps to Take
It is recommended to apply the necessary patches provided by Cisco to mitigate the vulnerabilities and prevent potential DoS attacks.
Long-Term Security Practices
Enhancing network security measures, restricting access privileges, and monitoring network traffic can help in fortifying the infrastructure against such vulnerabilities.
Patching and Updates
Regularly check for security advisories and updates from Cisco to safeguard the network infrastructure against potential risks.