Vulnerability Details CVE-2021-27878
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.01
EPSS Ranking 75.7%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 9.0
Proposed Action
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.
Ransomware Campaign
Known
References
- http://packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html
- https://www.veritas.com/content/support/en_US/security/VTS21-001#issue3
- http://packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html
- https://www.veritas.com/content/support/en_US/security/VTS21-001#issue3
Products affected by CVE-2021-27878
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cpe:2.3:a:veritas:backup_exec:10.0
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cpe:2.3:a:veritas:backup_exec:14.1.1786.1126
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cpe:2.3:a:veritas:backup_exec:14.2.1180.3160
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cpe:2.3:a:veritas:backup_exec:15.1180
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cpe:2.3:a:veritas:backup_exec:16.0.1142.1327
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cpe:2.3:a:veritas:backup_exec:16.1142
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cpe:2.3:a:veritas:backup_exec:20.0
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cpe:2.3:a:veritas:backup_exec:20.0.1188.2734
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cpe:2.3:a:veritas:backup_exec:21.0
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cpe:2.3:a:veritas:backup_exec:21.0.1200.1217
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cpe:2.3:a:veritas:backup_exec:9.0
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cpe:2.3:a:veritas:backup_exec:9.0.4019
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cpe:2.3:a:veritas:backup_exec:9.1.307