CVE-2021-21818 : Security Advisory and Response
Learn about CVE-2021-21818, a high-severity vulnerability in D-LINK DIR-3040 1.13B03 enabling denial of service attacks. Find mitigation strategies and patching recommendations.
A hard-coded password vulnerability exists in the Zebra IP Routing Manager functionality of D-LINK DIR-3040 1.13B03, allowing attackers to trigger denial of service through specially crafted network requests.
Understanding CVE-2021-21818
This vulnerability affects D-Link devices running version D-LINK DIR-3040 1.13B03, leading to high availability impact.
What is CVE-2021-21818?
CVE-2021-21818 is a hard-coded password vulnerability in the Zebra IP Routing Manager functionality of D-LINK DIR-3040 1.13B03. It can be exploited by sending a sequence of specially crafted network requests.
The Impact of CVE-2021-21818
The vulnerability has a CVSS base score of 7.5, classified as high severity, with a potential denial of service attack via network exploitation.
Technical Details of CVE-2021-21818
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from a hard-coded password issue within the Zebra IP Routing Manager feature of D-LINK DIR-3040 1.13B03, enabling malicious actors to instigate denial of service through network manipulation.
Affected Systems and Versions
D-Link devices with the specific version D-LINK DIR-3040 1.13B03 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a series of maliciously crafted requests to the affected network device, resulting in denial of service.
Mitigation and Prevention
Protecting against CVE-2021-21818 requires immediate actions and long-term security measures.
Immediate Steps to Take
Users of the affected D-Link devices should apply security patches provided by the vendor and restrict network access to mitigate exploitation risks.
Long-Term Security Practices
Enforce strong password policies, conduct regular security assessments, and keep software and firmware up to date to enhance overall network security.
Patching and Updates
Regularly check for security updates from D-Link and promptly apply patches to address identified vulnerabilities.