CVE-2021-27877 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-27877 affecting Veritas Backup Exec before 21.2. Learn about the impact, technical aspects, and mitigation strategies for this critical vulnerability.
Veritas Backup Exec before version 21.2 is affected by CVE-2021-27877, a vulnerability related to SHA authentication. This CVE allows attackers to gain unauthorized access to an Agent and execute privileged commands remotely.
Understanding CVE-2021-27877
This section provides insights into the nature and impact of CVE-2021-27877.
What is CVE-2021-27877?
The vulnerability in Veritas Backup Exec before 21.2 stems from its support for multiple authentication schemes, including SHA authentication. Although not utilized in current versions, the undisabled SHA scheme can be exploited by threat actors to compromise an Agent.
The Impact of CVE-2021-27877
With a CVSS base score of 8.2 (High severity), this vulnerability poses a significant risk. Attackers can leverage it to achieve high confidentiality impact and execute unauthorized privileged commands.
Technical Details of CVE-2021-27877
Explore the technical aspects of CVE-2021-27877 to better understand its implications and potential risks.
Vulnerability Description
The vulnerability allows remote attackers to gain unauthorized access to the Veritas Backup Exec Agent and perform privileged actions, exploiting the unsecured SHA authentication scheme.
Affected Systems and Versions
All versions of Veritas Backup Exec prior to 21.2 are affected by this CVE due to the presence of the vulnerable SHA authentication scheme.
Exploitation Mechanism
By leveraging the unsecured SHA authentication scheme, threat actors can remotely exploit the vulnerability to compromise the Agent and execute commands.
Mitigation and Prevention
Learn how to protect your systems and data from CVE-2021-27877 through effective mitigation strategies.
Immediate Steps to Take
To mitigate the risk posed by CVE-2021-27877, ensure that Veritas Backup Exec is updated to version 21.2 or newer. Additionally, review and enhance access controls to minimize unauthorized access.
Long-Term Security Practices
Implement robust security practices, including regular security assessments and employee training on identifying and mitigating potential threats.
Patching and Updates
Regularly update Veritas Backup Exec to the latest version available to patch vulnerabilities and enhance system security.