CVE-2021-27878 : Security Advisory and Response
Discover the impact of CVE-2021-27878 on Veritas Backup Exec security. Learn about the vulnerability, affected systems, exploitation risk, and mitigation steps.
Veritas Backup Exec before version 21.2 is affected by a vulnerability in the SHA Authentication scheme, allowing an attacker to gain unauthorized access and execute arbitrary commands with system privileges over a secure TLS communication. Here's what you need to know about CVE-2021-27878:
Understanding CVE-2021-27878
This section will cover the description, impact, and technical details of CVE-2021-27878.
What is CVE-2021-27878?
An issue was discovered in Veritas Backup Exec before 21.2 that allows unauthorized access to execute arbitrary system commands using system privileges via a vulnerability in the SHA Authentication scheme.
The Impact of CVE-2021-27878
The vulnerability in CVE-2021-27878 poses a high-risk threat with a CVSS base score of 8.8, affecting confidentiality, integrity, and availability of the system, requiring low privileges for exploitation.
Technical Details of CVE-2021-27878
Let's delve into the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The flaw in the SHA Authentication scheme allows an attacker to successfully complete the authentication process and execute arbitrary commands on the system with system privileges.
Affected Systems and Versions
Veritas Backup Exec before version 21.2 is affected by this vulnerability, impacting the communication between a client and an Agent.
Exploitation Mechanism
By exploiting the vulnerability in the SHA Authentication scheme, an attacker can gain unauthorized access and execute arbitrary commands with system privileges.
Mitigation and Prevention
Learn about the immediate steps to take and the best security practices to mitigate the risk posed by CVE-2021-27878.
Immediate Steps to Take
It is recommended to update Veritas Backup Exec to version 21.2 or apply patches provided by the vendor to address the vulnerability.
Long-Term Security Practices
Implement network segmentation, access controls, and regular security updates to prevent unauthorized access and enhance system security.
Patching and Updates
Regularly monitor vendor security advisories and apply security patches promptly to protect systems from potential threats.