CVE-2021-28485 : What You Need to Know
Discover the impact and mitigation strategies for CVE-2021-28485, a security flaw in Ericsson's Mobile Switching Center Server (MSC-S) allowing unauthorized access to system files.
A security vulnerability in Ericsson's Mobile Switching Center Server (MSC-S) before IS 3.1 CP22 has been identified, allowing unauthorized access to system files via a relative path traversal in the SIS web application.
Understanding CVE-2021-28485
This section elaborates on the critical details of CVE-2021-28485.
What is CVE-2021-28485?
The CVE-2021-28485 vulnerability in Ericsson's MSC-S enables threat actors to perform relative path traversal by manipulating a specific parameter in an https request post-authentication, leading to unauthorized access to sensitive files on the system.
The Impact of CVE-2021-28485
The exploitation of this vulnerability could result in unauthorized access to files on the server that are not meant to be exposed, potentially leading to information leakage and further security compromises.
Technical Details of CVE-2021-28485
This section covers the technical aspects of CVE-2021-28485.
Vulnerability Description
The SIS web application in Ericsson's MSC-S is susceptible to relative path traversal due to inadequate input validation, allowing attackers to access files outside the intended web application directories.
Affected Systems and Versions
Vendor and product information is unavailable, but versions of Ericsson's MSC-S prior to IS 3.1 CP22 are confirmed to be impacted by this vulnerability.
Exploitation Mechanism
Threat actors can exploit this vulnerability by sending a specially crafted https request with manipulated parameters, enabling them to navigate through the file system and access restricted files.
Mitigation and Prevention
Learn how to protect your systems from the CVE-2021-28485 vulnerability.
Immediate Steps to Take
It is recommended to apply security patches provided by Ericsson to mitigate the vulnerability and prevent unauthorized file access.
Long-Term Security Practices
Implement robust input validation mechanisms and access controls within web applications to prevent path traversal and enhance overall system security.
Patching and Updates
Regularly update your software and apply security patches released by the vendor to address known vulnerabilities and strengthen the security posture of your systems.