CVE-2021-27248 : Security Advisory and Response
Learn about CVE-2021-27248 impacting D-Link DAP-2020 v1.01rc001. This vulnerability allows remote attackers to execute arbitrary code without authentication, posing a high risk. Find mitigation steps here.
This CVE-2021-27248 affects D-Link DAP-2020 v1.01rc001 Wi-Fi access points, allowing network-adjacent attackers to execute arbitrary code without authentication. The vulnerability is due to a stack-based buffer overflow.
Understanding CVE-2021-27248
This section provides detailed insights into the vulnerability.
What is CVE-2021-27248?
CVE-2021-27248 is a vulnerability in D-Link DAP-2020 v1.01rc001 that enables attackers to run arbitrary code on affected devices without the need for authentication. The flaw lies in the inadequate validation of user-supplied data in CGI scripts.
The Impact of CVE-2021-27248
This vulnerability poses a high risk with a CVSS base score of 8.8, impacting confidentiality, integrity, and availability of affected systems. Attackers can exploit this flaw to execute code with root privileges.
Technical Details of CVE-2021-27248
In this section, we delve into the technical specifics of the vulnerability.
Vulnerability Description
The vulnerability arises from improper data validation when processing the getpage parameter, leading to a stack-based buffer overflow. This allows attackers to execute arbitrary code in the context of root.
Affected Systems and Versions
D-Link DAP-2020 devices running version v1.01rc001 are affected by this vulnerability.
Exploitation Mechanism
Attackers exploiting CVE-2021-27248 can carry out remote code execution without authentication, compromising the security and functionality of the targeted devices.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent exploitation of CVE-2021-27248.
Immediate Steps to Take
Owners of D-Link DAP-2020 v1.01rc001 devices should apply security patches promptly to address this vulnerability. Network segmentation and access controls can also help reduce the risk of exploitation.
Long-Term Security Practices
Implementing secure coding practices, regular security assessments, and network monitoring are recommended for long-term security improvements.
Patching and Updates
Stay informed about security updates from D-Link and apply patches as soon as they are released to safeguard your devices against potential exploits.