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Vulnerability Details : 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.
Publish Date : 2019-01-03 Last Update Date : 2019-09-02
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- CVSS Scores & Vulnerability Types

CVSS Score
4.9
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 787

- Products Affected By CVE-2019-3701

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 14.04 ~~lts~~~ Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 ~~lts~~~ Version Details Vulnerabilities
3 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
4 OS Linux Linux Kernel 4.19.13 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 2
Debian Debian Linux 1
Linux Linux Kernel 1

- References For CVE-2019-3701

https://usn.ubuntu.com/4118-1/
UBUNTU USN-4118-1
https://usn.ubuntu.com/4115-1/
UBUNTU USN-4115-1
https://usn.ubuntu.com/3932-1/
UBUNTU USN-3932-1
https://usn.ubuntu.com/3932-2/
UBUNTU USN-3932-2
https://marc.info/?l=linux-netdev&m=154651842302479&w=2
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
MLIST [debian-lts-announce] 20190503 [SECURITY] [DLA 1771-1] linux-4.9 security update
https://support.f5.com/csp/article/K17957133 CONFIRM
https://marc.info/?l=linux-netdev&m=154661373531512&w=2
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
MLIST [debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
MLIST [debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=0aaa81377c5a01f686bcdb8c7a6929a7bf330c68
http://www.securityfocus.com/bid/106443
BID 106443 Linux Kernel 'can_can_gw_rcv in net/can/gw.c' Local Denial of Service Vulnerability Release Date:2019-04-19
https://bugzilla.suse.com/show_bug.cgi?id=1120386

- Metasploit Modules Related To CVE-2019-3701

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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