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CVE-2021-27876

An issue was discovered in Veritas Backup Exec before 21.2.

Published
Last modified
published
Listed in CISA KEV
None on Exploit-DB, Metasploit or GitHub

Summary

Veritas Backup Exec (versions before 21.2) is affected, and the flaw could let an attacker bypass authentication between a client and agent and then read any file on the system with System-level privileges. This could expose sensitive data and compromise the security of the backup server.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original 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.

Timeline

  1. CVE published
  2. Added to CISA KEV

    CISA has evidence of exploitation in the wild

  3. CISA remediation deadline

    Due date for US federal agencies to patch

  4. Record last updated
  5. EPSS reached 10%

    FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

  • n/a n/a

    Version range not reported

References 2

veritas.com

packetstormsecurity.com