Improper conditions check in some Intel(R) BIOS Guard firmware may allow a privileged user to…
CVE-2023-27504 is a high-severity vulnerability in Intel(R) BIOS Guard firmware, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited with local access to the system by an attacker with administrator privileges, without any action from a user. Affected Intel(R) BIOS Guard firmware versions: See references. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Intel(R) BIOS Guard firmware you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Intel(R) BIOS Guard firmware | Intel(R) BIOS Guard firmware | See references | Not stated |
| Intel | kaby_lake | Not specified in the record | Not stated |
| Intel | coffee_lake | Not specified in the record | Not stated |
| Intel | comet_lake | Not specified in the record | Not stated |
| Intel | ice_lake | Not specified in the record | Not stated |
| Intel | rocket_lake | Not specified in the record | Not stated |
| Intel | tiger_lake | Not specified in the record | Not stated |
| Intel | amber_lake | Not specified in the record | Not stated |
| Intel | alder_lake | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N. Scored by CNA (intel.com).
Official description
Improper conditions check in some Intel(R) BIOS Guard firmware may allow a privileged user to potentially enable escalation of privilege via local access.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Intel(R) BIOS Guard firmware
- 7.2 High severity
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