Upstream information

CVE-2019-3701 at MITRE

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.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 7.1
Vector AV:N/AC:M/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 5.5 7
Vector AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector Local Local
Access Complexity Low High
Privileges Required None Low
User Interaction Required None
Scope Unchanged Unchanged
Confidentiality Impact None High
Integrity Impact None High
Availability Impact High High
SUSE Bugzilla entry: 1120386 [IN_PROGRESS]

No SUSE Security Announcements cross referenced.


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Desktop 12 SP3 kernel-source Analysis
SUSE Linux Enterprise Desktop 12 SP4 kernel-source Analysis
SUSE Linux Enterprise High Performance Computing 12 kernel-source Analysis
SUSE Linux Enterprise Module for Basesystem 15 GA kernel-source Analysis
SUSE Linux Enterprise Module for Development Tools 15 GA kernel-source Analysis
SUSE Linux Enterprise Server 11 SP1 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP1 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 11 SP2 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP3 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 11 SP4 kernel-source Analysis
SUSE Linux Enterprise Server 12 GA LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 for Raspberry PI kernel-source Analysis
SUSE Linux Enterprise Server 12 SP3 kernel-source Analysis
SUSE Linux Enterprise Server 12 SP4 kernel-source Analysis
SUSE Linux Enterprise Server for SAP AIO 11 SP1 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 11 SP2 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 11 SP3 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 GA kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP2 kernel-source Analysis
SUSE Linux Enterprise Server for SAP Applications 12 SP4 kernel-source Analysis
SUSE Linux Enterprise Server for SAP ES 11 SP1 kernel-source Analysis