CVE Vulnerability

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.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 7.8

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

8.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.veritas.com/content/support/en_US/security/VTS21-001#issue2 Vendor Advisory
http://packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:veritas:backup_exec:*:*:*:*:*:*:*:*
Information

Published : 2021-03-01 10:15

Updated : 2022-09-27 08:14

NVD link : CVE-2021-27876

Mitre link : CVE-2021-27876

Products Affected
No products.
CWE
CWE-287