| ID |
CVE-2019-3701
|
| Sažetak |
An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field. The privileged user "root" with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller's I/O memory when processing can-gw manipulated outgoing frames. |
| Reference |
|
| CVSS |
| Base: | 4.9 |
| Impact: | 6.9 |
| Exploitability: | 3.9 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| LOCAL |
LOW |
NONE |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| NONE |
NONE |
COMPLETE |
|
| CVSS vektor |
AV:L/AC:L/Au:N/C:N/I:N/A:C |
| Zadnje važnije ažuriranje |
03-09-2019 - 00:15 |
| Objavljeno |
03-01-2019 - 16:29 |
