CVE-2024-1638

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 v3.1

9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1

8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

EPSS

0.35% chance of exploitation in the next 30 days, 28th percentile

Published

2024-02-19

Updated

2025-04-24

Proof-of-concept exploits (1)

• zephyrproject-rtos/zephyr/security/advisories/GHSA-p6f3-f63q-5mc2

References

• CVE Record
• NVD entry

Related

• CVE-2023-3725
• CVE-2023-4257
• CVE-2023-4259
• CVE-2023-4260
• CVE-2023-4264
• CVE-2023-4265