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Vulnerability Details CVE-2021-27876

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 69.5%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 7.5
Proposed Action
Veritas Backup Exec (BE) Agent contains a file access vulnerability that could allow an attacker to specially craft input parameters on a data management protocol command to access files on the BE Agent machine.
Ransomware Campaign
Known
Products affected by CVE-2021-27876


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