zephyrproject-rtos Zephyr up to 3.5 Bluetooth input validation

Summaryinfo

A vulnerability described as critical has been identified in zephyrproject-rtos Zephyr up to 3.5. This issue affects some unknown processing of the component Bluetooth Handler. Such manipulation leads to input validation. This vulnerability is documented as CVE-2024-1638. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in zephyrproject-rtos Zephyr up to 3.5 (Project Management Software). Affected by this issue is an unknown code block of the component Bluetooth Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The documentation specifies that the BT_GATT_PERM_READ_LESC and BT_GATT_PERM_WRITE_LESC defines for a Bluetooth characteristic: Attribute read/write permission with LE Secure Connection encryption. If set, requires that LE Secure Connections is used for read/write access, however this is only true when it is combined with other permissions, namely BT_GATT_PERM_READ_ENCRYPT/BT_GATT_PERM_READ_AUTHEN (for read) or BT_GATT_PERM_WRITE_ENCRYPT/BT_GATT_PERM_WRITE_AUTHEN (for write), if these additional permissions are not set (even in secure connections only mode) then the stack does not perform any permission checks on these characteristics and they can be freely written/read.

The weakness was released 02/20/2024 as GHSA-p6f3-f63q-5mc2. The advisory is available at github.com. This vulnerability is handled as CVE-2024-1638 since 02/19/2024. 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 01/17/2025).

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

Type

• Project Management Software

Vendor

• zephyrproject-rtos

Name

• Zephyr

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5

License

• open-source

Website

• Product: https://github.com/zephyrproject-rtos/zephyr/

CPE 2.3info

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CPE 2.2info

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