CVE-2023-34344Network attack vector

Username disclosure via IPMI response oracle

Published Jun 12, 2023 · Updated Jan 3, 2025

Observable discrepancy in the IPMI handler in AMI MegaRAC SP-X allows remote attackers to identify valid usernames through an oracle. The handler exposes distinguishable results for valid and invalid candidate usernames instead of making them observationally equivalent. No credentials or user interaction are required, and the disclosed information is limited to username validity.

CVSS severity5.3
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable discrepancy in the IPMI handler in AMI MegaRAC SP-X allows remote attackers to identify valid usernames through an oracle. The handler exposes distinguishable results for valid and invalid candidate usernames instead of making them observationally equivalent. No credentials or user interaction are required, and the disclosed information is limited to username validity.

The record

CVE
CVE-2023-34344
Published
Jun 12, 2023
Updated
Jan 3, 2025
Vendor
American Megatrends International
Product
MegaRAC SP-X
Classifications
CWE-203, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.0 <12.7
  2. Affected versionversion=13.0 <13.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

American Megatrends International · MegaRAC SP-Xversion=12.0 <12.7; version=13.0 <13.5

Published CVSS scores

5.3AMICVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1087Account Discovery

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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