CVE Details

Release Date:2019-01-03


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

PlatformErrataRelease Date
Oracle Linux version 6 (dtrace-modules-3.8.13-118.32.1.el6uek)ELSA-2019-46002019-04-08
Oracle Linux version 6 (kernel-uek)ELSA-2019-45962019-03-31
Oracle Linux version 6 (kernel-uek)ELSA-2019-46002019-04-08
Oracle Linux version 7 (dtrace-modules-3.8.13-118.32.1.el7uek)ELSA-2019-46002019-04-08
Oracle Linux version 7 (kernel-uek)ELSA-2019-45962019-03-31
Oracle Linux version 7 (kernel-uek)ELSA-2019-46002019-04-08
Oracle Linux version 7 (kernel-uek)ELSA-2019-46122019-04-12
Oracle VM version 3.4 (kernel-uek)OVMSA-2019-00142019-05-02

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team