CVE-2019-20908

Aliases:UBUNTU-CVE-2019-20908DEBIAN-CVE-2019-20908
Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 15 Jul 2020, 21:24
Last modified:05 Aug 2024, 02:53

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
6.9 MEDIUM
v2.0 (nvd)
EPSS Score
0.51% LOW
1% probability +0.50%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

15 Jul 2020, 21:24
Published
Vulnerability first disclosed
05 Aug 2024, 02:53
Last Modified
Vulnerability information updated

Description

An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 6.9AV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.51%• Percentile: 43%

Affected Systems

  • canonical•ubuntu_linux

    16.04 | 18.04

  • debian•linux

    < 5.2.6-1 | < 5.2.6-1 | < 5.2.6-1 | < 5.2.6-1

  • ubuntu•linux

    < 4.15.0-112.113

  • ubuntu•linux-aws

    < 4.15.0-1079.83

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    < 5.3.0-1032.34~18.04.2

  • ubuntu•linux-aws-fips

    < 4.15.0-2024.24 | all

  • ubuntu•linux-aws-hwe

    < 4.15.0-1079.83~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1092.102~14.04.1 | < 4.15.0-1092.102~16.04.1 | all

  • ubuntu•linux-azure-4.15

    < 4.15.0-1092.102

  • ubuntu•linux-azure-5.3

    < 5.3.0-1034.35~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2006.7 | all

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.15.0-1037.42

  • ubuntu•linux-gcp

    < 4.15.0-1080.90~16.04.1 | all

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1080.90

  • ubuntu•linux-gcp-5.3

    < 5.3.0-1032.34~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all

  • ubuntu•linux-gke

    all

  • ubuntu•linux-gke-4.15

    < 4.15.0-1066.69

  • ubuntu•linux-gke-5.0

    < 5.0.0-1045.46

  • ubuntu•linux-gke-5.3

    < 5.3.0-1032.34~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-112.113~16.04.1 | < 5.3.0-64.58~18.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.15.0-1071.72

  • ubuntu•linux-oem

    < 4.15.0-1093.103

  • ubuntu•linux-oem-osp1

    < 5.0.0-1065.70

  • ubuntu•linux-oracle

    < 4.15.0-1050.54~16.04.1 | < 4.15.0-1050.54

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    < 5.3.0-1030.32~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1067.71 | all

  • ubuntu•linux-raspi2-5.3

    < 5.3.0-1030.32~18.04.2

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all

  • ubuntu•linux-snapdragon

    < 4.15.0-1083.91

  • linux•linux_kernel

    < 5.4

  • opensuse•leap

    15.1

References (21)