CVE-2019-20908

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.7 MEDIUM
LOCAL
LOW
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 4%
VendorProductVersion
linuxlinux_kernel
𝑥
< 5.4
opensuseleap
15.1
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
fixed
stretch
ignored
bullseye (security)
5.10.226-1
fixed
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
trixie
6.11.5-1
fixed
sid
6.11.6-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
Fixed 4.15.0-112.113
released
xenial
not-affected
trusty
not-affected
linux-aws
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
Fixed 4.15.0-1079.83
released
xenial
not-affected
trusty
not-affected
linux-aws-5.0
groovy
dne
focal
dne
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
linux-aws-5.3
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-1032.34~18.04.2
released
xenial
dne
trusty
dne
linux-aws-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-aws-hwe
groovy
dne
focal
dne
eoan
dne
bionic
dne
xenial
Fixed 4.15.0-1079.83~16.04.1
released
trusty
dne
linux-azure
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
ignored
xenial
Fixed 4.15.0-1092.102~16.04.1
released
trusty
Fixed 4.15.0-1092.102~14.04.1
released
linux-azure-4.15
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 4.15.0-1092.102
released
xenial
dne
trusty
dne
linux-azure-5.3
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-1034.35~18.04.1
released
xenial
dne
trusty
dne
linux-azure-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-edge
groovy
dne
focal
dne
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
linux-dell300x
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
ignored
xenial
Fixed 4.15.0-1080.90~16.04.1
released
trusty
dne
linux-gcp-4.15
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 4.15.0-1080.90
released
xenial
dne
trusty
dne
linux-gcp-5.3
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-1032.34~18.04.1
released
xenial
dne
trusty
dne
linux-gcp-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-edge
groovy
dne
focal
dne
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gke-4.15
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 4.15.0-1066.69
released
xenial
dne
trusty
dne
linux-gke-5.0
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.0.0-1045.46
released
xenial
dne
trusty
dne
linux-gke-5.3
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-1032.34~18.04.1
released
xenial
dne
trusty
dne
linux-gke-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gkeop
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-gkeop-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-64.58~18.04.1
released
xenial
Fixed 4.15.0-112.113~16.04.1
released
trusty
dne
linux-hwe-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe-5.8
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-hwe-edge
groovy
dne
focal
dne
eoan
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-kvm
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
Fixed 4.15.0-1071.72
released
xenial
not-affected
trusty
dne
linux-lts-trusty
groovy
dne
focal
dne
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-lts-xenial
groovy
dne
focal
dne
eoan
dne
bionic
dne
xenial
dne
trusty
not-affected
linux-oem
groovy
dne
focal
dne
eoan
ignored
bionic
Fixed 4.15.0-1093.103
released
xenial
ignored
trusty
dne
linux-oem-5.10
groovy
dne
focal
not-affected
bionic
dne
xenial
dne
trusty
dne
linux-oem-5.6
groovy
dne
focal
not-affected
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-oem-osp1
groovy
dne
focal
dne
eoan
ignored
bionic
Fixed 5.0.0-1065.70
released
xenial
dne
trusty
dne
linux-oracle
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
Fixed 4.15.0-1050.54
released
xenial
Fixed 4.15.0-1050.54~16.04.1
released
trusty
dne
linux-oracle-5.0
groovy
dne
focal
dne
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
linux-oracle-5.3
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-1030.32~18.04.1
released
xenial
dne
trusty
dne
linux-oracle-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi
groovy
not-affected
focal
not-affected
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-raspi-5.4
groovy
dne
focal
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi2
groovy
dne
focal
ignored
eoan
ignored
bionic
Fixed 4.15.0-1067.71
released
xenial
not-affected
trusty
dne
linux-raspi2-5.3
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 5.3.0-1030.32~18.04.2
released
xenial
dne
trusty
dne
linux-riscv
groovy
not-affected
focal
not-affected
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-snapdragon
groovy
dne
focal
dne
eoan
dne
bionic
Fixed 4.15.0-1083.91
released
xenial
not-affected
trusty
dne
References
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
http://www.openwall.com/lists/oss-security/2020/07/20/6
http://www.openwall.com/lists/oss-security/2020/07/29/3
http://www.openwall.com/lists/oss-security/2020/07/30/2
http://www.openwall.com/lists/oss-security/2020/07/30/3
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e
https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html
https://usn.ubuntu.com/4426-1/
https://usn.ubuntu.com/4427-1/
https://usn.ubuntu.com/4439-1/
https://usn.ubuntu.com/4440-1/
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
http://www.openwall.com/lists/oss-security/2020/07/20/6
http://www.openwall.com/lists/oss-security/2020/07/29/3
http://www.openwall.com/lists/oss-security/2020/07/30/2
http://www.openwall.com/lists/oss-security/2020/07/30/3
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e
https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html
https://usn.ubuntu.com/4426-1/
https://usn.ubuntu.com/4427-1/
https://usn.ubuntu.com/4439-1/
https://usn.ubuntu.com/4440-1/