CVE-2023-40256Network attack vector

Job-control message disclosure and tampering via certificate misvalidation

Published Aug 11, 2023 · Updated Oct 10, 2024

Improper certificate validation in Veritas NetBackup Snapshot Manager before 10.2.0.1 allows remote attackers to alter RabbitMQ job-control messages. A RabbitMQ service misconfiguration fails to validate client certificates properly, accepting credentials from untrusted clients for service interaction. Network reachability to that service is sufficient to read or alter messages and interrupt backup or restore jobs, but snapshot data and primary-server RabbitMQ instances are outside the impact.

CVSS severity9.8
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Veritas NetBackup Snapshot Manager before 10.2.0.1 allows remote attackers to alter RabbitMQ job-control messages. A RabbitMQ service misconfiguration fails to validate client certificates properly, accepting credentials from untrusted clients for service interaction. Network reachability to that service is sufficient to read or alter messages and interrupt backup or restore jobs, but snapshot data and primary-server RabbitMQ instances are outside the impact.

The record

CVE
CVE-2023-40256
Published
Aug 11, 2023
Updated
Oct 10, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-295, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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