CVE-2023-34335

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-12 · updated 2026-06-17
Weakness: CWE-288

Description

AMI BMC contains a vulnerability in the IPMI handler, where an unauthenticated host is allowed to write to a host SPI flash, bypassing secure boot protections. An exploitation of this vulnerability may lead to a loss of integrity or denial of service.

Affected products

AMI Megarac Spx: from 12.0 before 12.7; from 13.0 before 13.5 — fixed in 12.7, 13.5

How to fix

Upgrade to a fixed version: AMI Megarac Spx 12.7, 13.5. Check the vendor advisory for mitigations.

References

https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/AMI-SA-2023005.pdf
https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/AMI-SA-2023005.pdf

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