Preh Car Connect Volkswagen MIB3 Infotainment System MIB3 OI MQB up to 0304 Bluetooth Stack integer overflow

Summaryinfo

A vulnerability has been found in Preh Car Connect Volkswagen MIB3 Infotainment System MIB3 OI MQB up to 0304 and classified as critical. This issue affects some unknown processing of the component Bluetooth Stack. Performing a manipulation results in integer overflow. This vulnerability was named CVE-2023-28909. The attack needs to be approached within the local network. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in Preh Car Connect Volkswagen MIB3 Infotainment System MIB3 OI MQB up to 0304. This affects an unknown part of the component Bluetooth Stack. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Mikhail Evdokimov. The advisory is shared at i.blackhat.com. This vulnerability is uniquely identified as CVE-2023-28909 since 03/27/2023. The exploitability is told to be easy. The attack needs to be done within the local network. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/01/2025).

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-32529). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Preh Car Connect

Name

• Volkswagen MIB3 Infotainment System MIB3 OI MQB

Version

• 0304

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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