CVE-2019-3701

Aliases:UBUNTU-CVE-2019-3701DEBIAN-CVE-2019-3701
Advisory lineage Upstream: 0 Downstream: 24
Modified
Published: 03 Jan 2019, 16:00
Last modified:04 Aug 2024, 19:19

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
4.9 MEDIUM
v2.0 (nvd)
EPSS Score
0.7% LOW
1% probability +0.64%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

03 Jan 2019, 16:00
Published
Vulnerability first disclosed
04 Aug 2024, 19:19
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.0•MEDIUM•Score: 4.4CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.70%• Percentile: 52%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04

  • debian•linux

    < 4.19.20-1 | < 4.19.20-1 | < 4.19.20-1 | < 4.19.20-1

  • ubuntu•linux

    all | < 4.4.0-145.171 | < 4.15.0-60.67

  • ubuntu•linux-aws

    < 4.4.0-1040.43 | < 4.4.0-1079.89 | < 4.15.0-1047.49

  • ubuntu•linux-aws-fips

    < 4.15.0-2018.18 | all

  • ubuntu•linux-aws-hwe

    < 4.15.0-1047.49~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1059.64~14.04.1 | < 4.15.0-1056.61 | < 5.0.0-1014.14~18.04.1

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2006.7 | all

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.4.0-1008.10

  • ubuntu•linux-gcp

    < 4.15.0-1041.43 | < 4.15.0-1042.45

  • ubuntu•linux-gcp-fips

    all

  • ubuntu•linux-gke

    all

  • ubuntu•linux-gke-4.15

    < 4.15.0-1041.43

  • ubuntu•linux-hwe

    < 4.15.0-60.67~16.04.1 | < 5.0.0-23.24~18.04.1

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1043.49 | < 4.15.0-1043.43

  • ubuntu•linux-lts-xenial

    < 4.4.0-144.170~14.04.1

  • ubuntu•linux-oem

    < 4.15.0-1056.65

  • ubuntu•linux-oracle

    < 4.15.0-1022.25~16.04.1 | < 4.15.0-1022.25

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1106.114 | < 4.15.0-1044.47

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all | all

  • ubuntu•linux-snapdragon

    < 4.4.0-1110.115 | < 4.15.0-1062.69

  • debian•debian_linux

    8.0

  • linux•linux_kernel

    ≤ 4.19.13

References (23)