CVE-2021-27734 : Exploit Details and Defense Strategies
Learn about CVE-2021-27734 affecting Hirschmann HiOS and HiSecOS versions, allowing remote attackers to alter user credentials. Find mitigation steps and security practices.
Hirschmann HiOS versions 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx, and HiSecOS versions 03.3.00 through 03.5.01 contain a vulnerability that allows remote attackers to modify existing user credentials.
Understanding CVE-2021-27734
This CVE describes a security issue in Hirschmann HiOS and HiSecOS that enables unauthorized users to alter user credentials.
What is CVE-2021-27734?
The CVE-2021-27734 vulnerability affects Hirschmann HiOS versions 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx, along with HiSecOS versions 03.3.00 through 03.5.01. Attackers can exploit this flaw remotely to change the login details of authorized users.
The Impact of CVE-2021-27734
This security issue poses a significant threat as malicious actors can compromise the integrity and confidentiality of systems by unauthorized modification of user credentials. It can lead to unauthorized access and potential data breaches.
Technical Details of CVE-2021-27734
The vulnerability allows remote attackers to manipulate the credentials of authorized users without proper authentication.
Vulnerability Description
Hirschmann HiOS and HiSecOS are susceptible to remote credential modification, enabling attackers to change user login details without proper authorization.
Affected Systems and Versions
Affected versions include Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx, as well as HiSecOS 03.3.00 through 03.5.01.
Exploitation Mechanism
Remote attackers can exploit this vulnerability through network connectivity, allowing them to alter user credentials remotely.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-27734, immediate action and long-term security practices are essential.
Immediate Steps to Take
Users are advised to update the affected HiOS and HiSecOS versions to patched releases provided by the vendor. Additionally, monitoring user account activities and enforcing strong password policies are crucial.
Long-Term Security Practices
Regular security assessments, user access reviews, and network segmentation play a vital role in enhancing overall cybersecurity posture.
Patching and Updates
Stay informed about security advisories from Hirschmann regarding CVE-2021-27734 and promptly apply recommended patches and updates to eliminate the vulnerability.