Nuvoton NPCM7xx BootBlock prior 10.10.19 authentication bypass

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Nuvoton NPCM7xx BootBlock. This impacts an unknown function. Such manipulation leads to authentication bypass. This vulnerability is listed as CVE-2024-38433. The attack must be carried out locally. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Nuvoton NPCM7xx BootBlock and classified as critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a authentication bypass vulnerability. Using CWE to declare the problem leads to CWE-305. The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Nuvoton - CWE-305: Authentication Bypass by Primary Weakness An attacker with write access to the SPI-Flash on an NPCM7xx BMC subsystem that uses the Nuvoton BootBlock reference code can modify the u-boot image header on flash parsed by the BootBlock which could lead to arbitrary code execution.

The weakness was presented by Ferdinand Nölscher. The advisory is shared for download at gov.il. This vulnerability is handled as CVE-2024-38433 since 06/16/2024. The exploitation is known to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 10.10.19 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.7
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CNA Base Score: 6.7
CNA Vector (INCD): 🔍

CVSSv2info

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

Exploitinginfo

Class: Authentication bypass
CWE: CWE-305 / CWE-287
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NPCM7xx BootBlock 10.10.19

Timelineinfo

06/16/2024 🔍
07/11/2024 +25 days 🔍
07/11/2024 +0 days 🔍
07/15/2024 +4 days 🔍

Sourcesinfo

Advisory: gov.il
Researcher: Ferdinand Nölscher
Status: Confirmed

CVE: CVE-2024-38433 (🔍)
GCVE (CVE): GCVE-0-2024-38433
GCVE (VulDB): GCVE-100-271148

Entryinfo

Created: 07/11/2024 10:24
Updated: 07/15/2024 22:14
Changes: 07/11/2024 10:24 (62), 07/11/2024 14:48 (1), 07/15/2024 22:14 (10)
Complete: 🔍
Cache ID: 216::103

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