Intel CPU BIOS Firmware toctou

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Intel CPU. It has been rated as critical. This vulnerability affects unknown code of the component BIOS Firmware Handler. This manipulation causes toctou. This vulnerability is registered as CVE-2022-21198. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Intel CPU (Chip Software) (version unknown). Affected by this vulnerability is an unknown function of the component BIOS Firmware Handler. The manipulation with an unknown input leads to a toctou vulnerability. The CWE definition for the vulnerability is CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Time-of-check time-of-use race condition in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

The weakness was published 11/12/2022 as intel-sa-00688. It is possible to read the advisory at intel.com. This vulnerability is known as CVE-2022-21198 since 02/18/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/12/2022).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 6.7
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.9
CNA Vector (Intel Corporation): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/18/2022 🔍
11/12/2022 +267 days 🔍
11/12/2022 +0 days 🔍
11/12/2022 +0 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: intel-sa-00688
Status: Confirmed

CVE: CVE-2022-21198 (🔍)
GCVE (CVE): GCVE-0-2022-21198
GCVE (VulDB): GCVE-100-213535

Entryinfo

Created: 11/12/2022 15:35
Changes: 11/12/2022 15:35 (48)
Complete: 🔍
Cache ID: 216::103

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