Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zephyrproject | Zephyr | <= 3.5.0 |
Related Weaknesses (CWE)
References
- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p6f3-f63q-ExploitVendor Advisory
- https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p6f3-f63q-ExploitVendor Advisory
FAQ
What is CVE-2024-1638?
CVE-2024-1638 is a vulnerability with a CVSS score of 8.2 (HIGH). 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...
How severe is CVE-2024-1638?
CVE-2024-1638 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-1638?
Check the references section above for vendor advisories and patch information. Affected products include: Zephyrproject Zephyr.