CVE-2019-3701

 

Published at: - 03-01-2019 05:29

Last modified: - 26-10-2022 01:44

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://marc.info/?l=linux-netdev&m=154651842302479&w=2
• https://bugzilla.suse.com/show_bug.cgi?id=1120386
• 106443-Third Party Advisory, VDB Entry
• [debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update-Mailing List, Third Party Advisory
• [debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update-Mailing List, Third Party Advisory
• USN-3932-2-Third Party Advisory
• USN-3932-1-Third Party Advisory
• https://support.f5.com/csp/article/K17957133
• https://marc.info/?l=linux-netdev&m=154661373531512&w=2
• https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=0aaa81377c5a01f686bcdb8c7a6929a7bf330c68
• [debian-lts-announce] 20190503 [SECURITY] [DLA 1771-1] linux-4.9 security update-Mailing List, Third Party Advisory
• USN-4115-1-
• USN-4118-1-
• openSUSE-SU-2020:0543-

 

Keywords

NVD

 

CVE-2019-3701

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures