CVE-2023-27504 — Improper conditions check in some Intel(R) BIOS Guard firmware may allow a privi

Improper conditions check in some Intel(R) BIOS Guard firmware may allow a privileged user to potentially enable escalation of privilege via local access.

01What is this vulnerability?

Improper conditions check in some Intel(R) BIOS Guard firmware may allow a privileged user to potentially enable escalation of privilege via local access.

02Affected products

Vendor	Product	Versions
n	a / Intel(R) BIOS Guard firmware	See references

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-05-16T20:47:48.296Z
• Last modified: 2024-08-02T12:16:36.604Z

09References

• www.intel.com — https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00814.…