CVE-2019-3701

Medium

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.

Package Linux Kernel
Published 2019-01-03
Last modified 2024-11-21
CVSS version 3.0
Patch available
Awaiting data

CVSS 3.0 score

4.4

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-787

CVE-2019-3701 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2019-3701 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

4 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2019-3701?

    CVE-2019-3701 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . CVE-2019-3701 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2019-3701?

    CVE-2019-3701 has a CVSS score of 4.4 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2019-3701?

    No patch is currently available for CVE-2019-3701. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2019-3701 actively exploited?

    No — CVE-2019-3701 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

  • What is Out-of-bounds Write (CWE-787)?

    The product writes data past the end or before the beginning of the intended buffer. View CWE-787 on MITRE CWE →

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