Intel BIOS Guard custom special character

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Intel BIOS Guard. This issue affects some unknown processing. Such manipulation leads to custom special character. This vulnerability is documented as CVE-2023-27504. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in Intel BIOS Guard (affected version not known) and classified as problematic. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a custom special character vulnerability. Using CWE to declare the problem leads to CWE-92. This entry has been deprecated. It originally came from PLOVER, which sometimes defined "other" and "miscellaneous" categories in order to satisfy exhaustiveness requirements for taxonomies. Within the context of CWE, the use of a more abstract entry is preferred in mapping situations. CWE-75 is a more appropriate mapping. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The advisory is available at intel.com. This vulnerability is handled as CVE-2023-27504 since 05/06/2023. The exploitation is known to be difficult. Local access is required to approach this attack. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/17/2024).

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

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Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.9
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.2
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: Custom special character
CWE: CWE-92 / CWE-74 / CWE-707
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

05/06/2023 🔍
05/17/2024 +377 days 🔍
05/17/2024 +0 days 🔍
05/17/2024 +0 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: intel-sa-00814
Status: Confirmed

CVE: CVE-2023-27504 (🔍)
GCVE (CVE): GCVE-0-2023-27504
GCVE (VulDB): GCVE-100-264686

Entryinfo

Created: 05/17/2024 06:53
Changes: 05/17/2024 06:53 (60)
Complete: 🔍
Cache ID: 216::103

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