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CVE-2023-28909

Integer Overflow Leading to MTU Bypass

Published: Jun 28, 2025Updated: Jun 30, 2025 Sources: CVE List NVDCWE-190
NVD MITRE
8.0CVSSHIGH
EPSS Score
0.5%
Top 61.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

A specific flaw exists within the Bluetooth stack of the MIB3 unit. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow when receiving fragmented HCI packets on a channel. An attacker can leverage this vulnerability to bypass the MTU check on a channel with enabled fragmentation. Consequently, this can lead to a buffer overflow in upper layer profiles, which can be used to obtain remote code execution. The vulnerability was originally discovered in Skoda Superb III car with MIB3 infotainment unit OEM part number 3V0035820. The list of affected MIB3 OEM part numbers is provided in the referenced resources.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-190

Affected Products

Volkswagen MIB3 infotainment system MIB3 OI MQBPreh Car Connect GmbH (JOYNEXT GmbH)
Embedded
Hardware Firmware / cpu-gpu
preh car connect gmbh (joynext gmbh)commercialHardware Firmwareaka joynext gmbh, volkswagen mib3 infotainment system mib3 oi mqb

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
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References

https://asrg.io/security-advisories/vulnerabilities-in-volkswagen-mib3-infotainment-part-2/
asrg.io
https://i.blackhat.com/EU-24/Presentations/EU-24-Parnishchev-OverTheAirVW.pdf
i.blackhat.com
https://pcacybersecurity.com/resources/advisory/vulnerabilities-in-vw-mib3-infotainment-2
pcacybersecurity.com

Timeline

Published
Jun 28, 2025
Last Updated
Jun 30, 2025

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