CVE-2021-31377 : Vulnerability Insights and Analysis
Learn about CVE-2021-31377, an Incorrect Permission Assignment for Critical Resource vulnerability in Junos OS allowing local attackers to cause Denial of Service (DoS). Find out impacted systems, exploit details, and mitigation steps.
An in-depth analysis of CVE-2021-31377 focusing on the Incorrect Permission Assignment for Critical Resource vulnerability affecting Junos OS.
Understanding CVE-2021-31377
This section provides insights into the nature and impact of the vulnerability.
What is CVE-2021-31377?
CVE-2021-31377 pertains to an Incorrect Permission Assignment for Critical Resource vulnerability in Junos OS that enables a local authenticated attacker to disrupt the routing process daemon (RPD), leading to a Denial of Service (DoS) attack.
The Impact of CVE-2021-31377
The vulnerability allows an attacker to crash the RPD, triggering a DoS condition. While no malicious exploitation has been reported, it poses a risk to affected Junos OS versions.
Technical Details of CVE-2021-31377
Explore the specifics related to the vulnerability, affected systems, and exploitation mechanisms.
Vulnerability Description
The vulnerability arises from an Incorrect Permission Assignment for Critical Resource in the filesystem of Junos OS, compromising the stability of the RPD.
Affected Systems and Versions
Juniper Networks' Junos OS versions ranging from 15.1 to 20.4 are impacted by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by a local authenticated attacker to repeatedly crash and restart the RPD, leading to a sustained DoS.
Mitigation and Prevention
Discover the steps to mitigate the impact of CVE-2021-31377 and prevent potential attacks.
Immediate Steps to Take
Utilize access lists or firewall filters to restrict access to trusted administrative networks, hosts, and users, minimizing the risk of exploitation.
Long-Term Security Practices
Implement regular security patches and updates to safeguard against known vulnerabilities and enhance overall system security.
Patching and Updates
Juniper Networks has released software updates for affected versions to address the vulnerability. Ensure timely application of these patches to secure your systems.