What is CVE-2023-40256?

CVE-2023-40256 is a critical-severity vulnerability in Veritas Netbackup Snapshot Manager, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2023-08-11.

How severe is CVE-2023-40256?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Veritas Netbackup Snapshot Manager

CVE-2023-40256

A vulnerability was discovered in Veritas NetBackup Snapshot Manager before 10.2.0.1 that allowed untrusted clients to interact with the RabbitMQ service. This was caused by improper validation of the client certificate due to misconfiguration of the RabbitMQ service. Exploiting this impacts the confidentiality and integrity of messages controlling the backup and restore jobs, and could result in the service becoming unavailable. This impacts only the jobs controlling the backup and restore activities, and does not allow access to (or deletion of) the backup snapshot data itself. This vulnerability is confined to the NetBackup Snapshot Manager feature and does not impact the RabbitMQ instance on the NetBackup primary servers.

Vulnerability class: Improper Certificate Validation

EPSS: 0.003 (25.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Veritas Netbackup_snapshot_manager — versions 9.0, 9.1, 9.1.0.1
N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

cve@mitre.org (Vendor Advisory)

Frequently asked questions

What is CVE-2023-40256?: CVE-2023-40256 is a critical-severity vulnerability in Veritas Netbackup Snapshot Manager, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2023-08-11.
How severe is CVE-2023-40256?: Critical severity. CVSS v3 base score is 9.8 out of 10.