6.4

CVE-2020-15705: canonical ubuntu_linux

CVSS: 6.4v3.1MediumModified
AliasesALPINE-CVE-2020-15705SUSE-SU-2020:14461-1SUSE-SU-2020:2303-1
Published 29-07-2020Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2020-15705 is a medium (CVSS 6.4) vulnerability in canonical ubuntu_linux. EPSS estimates a 1.39% chance of exploitation in the next 30 days, higher than 71.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 2
MGASA-2021-0315OPENSUSE-SU-2024:10824-1RHSA-2020:3216RHSA-2020:3217RHSA-2020:3223RHSA-2020:3227

Timeline

  1. 29-07-2020
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.39%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

0.00 pp

From 1.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse27 products
  • grub2&distro=HPE Helion OpenStack 8< 2.02-4.61.1
  • grub2&distro=SUSE Enterprise Storage 5< 2.02-4.61.1
  • grub2&distro=SUSE Linux Enterprise High Performance Computing 15-ESPOS< 2.02-19.56.1
  • grub2&distro=SUSE Linux Enterprise High Performance Computing 15-LTSS< 2.02-19.56.1
  • grub2&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 2.02-26.33.1
Microsoft6 products
Ubuntu4 products
  • grub2< 2.02~beta2-9ubuntu1.20 | < 2.02~beta2-36ubuntu3.26 | < 2.02-2ubuntu8.16 | < 2.04-1ubuntu26.1
  • grub2-signed< 1.34.22 | < 1.66.26 | < 1.93.18 | < 1.142.3
  • grub2-unsignedAll versions (No fix recorded)
  • grub2 in ubuntu≥ 20.04 LTS, < 2.04-1ubuntu26.1 | ≥ 18.04 LTS, < 2.02-2ubuntu8.16 | ≥ 16.04 LTS, < 2.02~beta2-36ubuntu3.26 | ≥ 14.04 ESM, < 2.02~beta2-9ubuntu1.20
Opensuse3 products
  • leapEOL15.1 | 15.2
  • grub2&distro=openSUSE Leap 15.1< 2.02-lp151.21.27.1
  • grub2&distro=openSUSE Leap 15.2< 2.04-lp152.7.9.1
Redhat3 products
Alpine1 product
  • grub< 2.06-r0
Canonical1 product
Debian1 product
Gnu1 product

9 vendors · 47 products

References

37 links
Show all 37 references