CVE-2021-27876 Information

Description

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. By using crafted input parameters in one of these commands an attacker can access an arbitrary file on the system using System privileges.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Reference

https://www.veritas.com/content/support/en_US/security/VTS21-001#issue2

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.1