CVE-2019-3701 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  4.4 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
http://www.securityfocus.com/bid/106443 Third Party Advisory  VDB Entry 
https://bugzilla.suse.com/show_bug.cgi?id=1120386 Exploit  Issue Tracking  Patch  Third Party Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=0aaa81377c5a01f686bcdb8c7a6929a7bf330c68 Mailing List  Patch  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html Mailing List  Third Party Advisory 
https://marc.info/?l=linux-netdev&m=154651842302479&w=2 Patch  Third Party Advisory 
https://marc.info/?l=linux-netdev&m=154661373531512&w=2 Mailing List  Patch  Third Party Advisory 
https://support.f5.com/csp/article/K17957133 Third Party Advisory 
https://usn.ubuntu.com/3932-1/ Third Party Advisory 
https://usn.ubuntu.com/3932-2/ Third Party Advisory 
https://usn.ubuntu.com/4115-1/
https://usn.ubuntu.com/4118-1/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write cwe source acceptance level NIST  

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Change History

12 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-3701
NVD Published Date:
01/03/2019
NVD Last Modified:
09/02/2019
Source:
MITRE