veritas backup-exec CVE-2021-27878 is a vulnerability in Veritas Backup Exec
Published on March 1, 2021

An issue was discovered in Veritas Backup Exec before 21.2. The communication between a client and an Agent requires successful authentication, which is typically completed over a secure TLS communication. However, due to a vulnerability in the SHA Authentication scheme, an attacker is able to gain unauthorized access and complete the authentication process. Subsequently, the client can execute data management protocol commands on the authenticated connection. The attacker could use one of these commands to execute an arbitrary command on the system using system privileges.

Vendor Advisory NVD

Known Exploited Vulnerability

This Veritas Backup Exec Agent Command Execution Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Veritas Backup Exec (BE) Agent contains a command execution vulnerability that could allow an attacker to use a data management protocol command to execute a command on the BE Agent machine.

The following remediation steps are recommended / required by April 28, 2023: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2021-27878 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

What is an authentification Vulnerability?

When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.

CVE-2021-27878 has been classified to as an authentification vulnerability or weakness.


Products Associated with CVE-2021-27878

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What versions of Backup Exec are vulnerable to CVE-2021-27878?