CVE-2019-3701
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- CVE-2019-3701
CVE Details
| Release Date: | 2019-01-03 |
Description
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.
See more information about CVE-2019-3701 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 4.4 | Base Metrics: | AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | High | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | None |
| Integrity Impact: | None | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 6 (dtrace-modules-3.8.13-118.32.1.el6uek) | ELSA-2019-4600 | 2019-04-08 |
| Oracle Linux version 6 (kernel-uek) | ELSA-2019-4596 | 2019-03-31 |
| Oracle Linux version 6 (kernel-uek) | ELSA-2019-4600 | 2019-04-08 |
| Oracle Linux version 7 (dtrace-modules-3.8.13-118.32.1.el7uek) | ELSA-2019-4600 | 2019-04-08 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2019-4596 | 2019-03-31 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2019-4600 | 2019-04-08 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2019-4612 | 2019-04-12 |
| Oracle VM version 3.4 (kernel-uek) | OVMSA-2019-0014 | 2019-05-02 |
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