CVE Vulnerability

CVE-2019-3701

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.

4.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 6.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

Scope

4.4 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
Information

Published : 2019-01-03 04:29

Updated : 2019-09-03 12:15

NVD link : CVE-2019-3701

Mitre link : CVE-2019-3701

Products Affected
No products.
CWE
CWE-787