Intel Processors input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Intel Processors. Affected by this vulnerability is an unknown functionality. Executing a manipulation can lead to input validation. This vulnerability is handled as CVE-2023-34440. It is possible to launch the attack on the local host. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Intel Processors (unknown version) and classified as critical. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Improper input validation in UEFI firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

The advisory is shared for download at intel.com. This vulnerability was named CVE-2023-34440 since 06/15/2023. The exploitation appears to be difficult. The attack needs to be approached locally. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/01/2026).

The vulnerability scanner Nessus provides a plugin with the ID 216356 (Fedora 41 : microcode_ctl (2025-c99f9d789a)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (216356) and CERT Bund (WID-SEC-2025-0323). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • HPE Synergy
  • Lenovo Computer
  • Fujitsu BIOS
  • HPE ProLiant
  • RESF Rocky Linux
  • HP BIOS
  • Lenovo BIOS
  • Dell PowerScale
  • Dell Computer
  • Dell PowerEdge
  • Intel Firmware

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.4
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (intel): 🔍

CVSSv2info

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

Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Nessus ID: 216356
Nessus Name: Fedora 41 : microcode_ctl (2025-c99f9d789a)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/15/2023 🔍
02/12/2025 +608 days 🔍
02/12/2025 +0 days 🔍
05/01/2026 +443 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: intel-sa-01139
Status: Confirmed

CVE: CVE-2023-34440 (🔍)
GCVE (CVE): GCVE-0-2023-34440
GCVE (VulDB): GCVE-100-295636
CERT Bund: WID-SEC-2025-0323 - Intel Firmware: Mehrere Schwachstellen

Entryinfo

Created: 02/12/2025 23:25
Updated: 05/01/2026 10:54
Changes: 02/12/2025 23:25 (72), 02/16/2025 13:03 (2), 10/14/2025 11:40 (7), 05/01/2026 10:51 (1), 05/01/2026 10:54 (4)
Complete: 🔍
Committer: lywand
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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