CVE-2021-27877

unknown KEV

Published 2023-04-07 · Modified 2023-04-07

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

2.5

Description

Veritas Backup Exec (BE) Agent contains an improper authentication vulnerability that could allow an attacker unauthorized access to the BE Agent via SHA authentication scheme.

CISA KEV

Vendor: Veritas
Product: Backup Exec Agent
Due date: 2023-04-28

Predictions

Exploit likelihood

99%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Metasploit modules

exploit_multi/veritas/beagent_sha_auth_rce rank 600

Veritas Backup Exec Agent Remote Code Execution

Source code queued for fetch — refresh in a moment.

References

https://www.veritas.com/support/en_US/security/VTS21-001; https://nvd.nist.gov/vuln/detail/CVE-2021-27877

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.