| ID |
CVE-2019-11516
|
| Summary |
An issue was discovered in the Bluetooth component of the Cypress (formerly owned by Broadcom) Wireless IoT codebase. Extended Inquiry Responses (EIRs) are improperly handled, which causes a heap-based buffer overflow during device inquiry. This overflow can be used to overwrite existing functions with arbitrary code. The Reserved for Future Use (RFU) bits are not discarded by eir_handleRx(), and are included in an EIR's length. Therefore, one can exceed the expected 240 bytes, which leads to a heap-based buffer overflow in eir_getReceivedEIR() called by bthci_event_SendInquiryResultEvent(). In order to exploit this bug, an attacker must repeatedly connect to the victim's device in a short amount of time from different source addresses. This will cause the victim's Bluetooth stack to resolve the device names and therefore allocate buffers with attacker-controlled data. Due to the heap corruption, the name will be eventually written to an attacker-controlled location, leading to a write-what-where condition. |
| References |
|
| Vulnerable Configurations |
|
| CVSS |
| Base: | 6.8 (as of 13-04-2020 - 15:15) |
| Impact: | |
| Exploitability: | |
|
| CWE |
CWE-787 |
| CAPEC |
|
| Access |
| Vector | Complexity | Authentication |
| NETWORK |
MEDIUM |
NONE |
|
| Impact |
| Confidentiality | Integrity | Availability |
| PARTIAL |
PARTIAL |
PARTIAL |
|
| cvss-vector
via4
|
AV:N/AC:M/Au:N/C:P/I:P/A:P
|
| refmap
via4
|
|
| Last major update |
13-04-2020 - 15:15 |
| Published |
05-02-2020 - 17:15 |
| Last modified |
13-04-2020 - 15:15 |
