CVE-2021-0261 Explained : Impact and Mitigation
Discover the impact of CVE-2021-0261, a Denial of Service (DoS) vulnerability in Juniper Networks Junos OS, affecting critical services due to a high number of specific requests. Learn about affected versions and mitigation steps.
A Denial of Service (DoS) vulnerability has been identified in Juniper Networks Junos OS, affecting various versions and products. An unauthenticated attacker could exploit this issue by sending a high number of specific requests to services like J-Web, Web Authentication, Dynamic-VPN (DVPN), Firewall Authentication Pass-Through, and Captive Portal.
Understanding CVE-2021-0261
This vulnerability could lead to an extended Denial of Service (DoS) attack on affected Juniper Networks Junos OS versions, impacting services reliant on HTTP/HTTPS.
What is CVE-2021-0261?
The CVE-2021-0261 vulnerability allows an unauthenticated attacker to disrupt HTTP/HTTPS-based services in Juniper Networks Junos OS by inundating them with a large number of specific requests.
The Impact of CVE-2021-0261
The vulnerability affects multiple Junos OS versions prior to certain releases, leading to a potential extended Denial of Service (DoS) situation for relevant services.
Technical Details of CVE-2021-0261
This section provides specific technical details about the vulnerability.
Vulnerability Description
The vulnerability stems from the HTTP/HTTPS service used by J-Web, Web Authentication, Dynamic-VPN, Firewall Authentication Pass-Through, and Captive Portal, allowing unauthenticated attackers to trigger a DoS condition through a high volume of specific requests.
Affected Systems and Versions
Juniper Networks Junos OS versions prior to certain releases are affected, including EX Series, SRX Series, and specific versions within each product line.
Exploitation Mechanism
Exploiting the vulnerability involves sending a significant number of specific requests to the vulnerable HTTP/HTTPS services, causing an extended DoS situation.
Mitigation and Prevention
Learn how to mitigate and prevent potential exploitation of this vulnerability.
Immediate Steps to Take
To mitigate the risk, consider the immediate steps outlined in this section.
Long-Term Security Practices
Implement long-term security best practices to enhance the protection of your systems against potential threats.
Patching and Updates
Update to the recommended software releases to address and resolve this specific vulnerability affecting Juniper Networks Junos OS.