CVE-2021-34697 : Vulnerability Insights and Analysis
Understand the impact of CVE-2021-34697, a Cisco IOS XE Software vulnerability allowing unauthenticated remote attackers to conduct DoS attacks. Learn about mitigation and prevention strategies.
A vulnerability in the Protection Against Distributed Denial of Service Attacks feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct denial of service (DoS) attacks to or through the affected device. This vulnerability is due to incorrect programming of the half-opened connections limit, TCP SYN flood limit, or TCP SYN cookie features when the features are configured in vulnerable releases of Cisco IOS XE Software. An attacker could exploit this vulnerability by attempting to flood traffic to or through the affected device. A successful exploit could allow the attacker to initiate a DoS attack to or through an affected device.
Understanding CVE-2021-34697
This section provides insights into the impact and technical details of the vulnerability.
What is CVE-2021-34697?
The vulnerability in Cisco IOS XE Software allows unauthenticated remote attackers to launch DoS attacks on the affected device by flooding it with traffic.
The Impact of CVE-2021-34697
With a CVSS base score of 5.8, this medium-severity vulnerability could lead to successful DoS attacks initiated by malicious actors.
Technical Details of CVE-2021-34697
Let's delve into the specifics of this security flaw.
Vulnerability Description
The vulnerability arises from incorrect programming regarding connection limits and features in Cisco IOS XE Software.
Affected Systems and Versions
Cisco IOS XE Software is affected by this vulnerability across all versions.
Exploitation Mechanism
Attackers can exploit this vulnerability by flooding malicious traffic through the affected device.
Mitigation and Prevention
Learn how to protect your systems from CVE-2021-34697.
Immediate Steps to Take
It is crucial to apply security patches provided by Cisco to mitigate the risk of exploitation.
Long-Term Security Practices
Implement network security best practices to prevent and detect potential DoS attacks.
Patching and Updates
Regularly update your Cisco IOS XE Software to ensure protection against known vulnerabilities.