VDB

CVE-2020-15706

CVE-2020-15706 PUBLISHED CVSS 6.400000095367432 MEDIUM

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

EPSS 0.98% · 60.6th percentile

Risk Scores

CVSS 3.1
6.400000095367432
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.98%
60.6th percentile

Affected Products

VendorProductVersions
Ubuntu:Pro:14.04:LTSgrub22.02~beta2-9ubuntu1.2, 2.00-20, 2.00-21
Ubuntu:18.04:LTSgrub22.02-2ubuntu8.14, 2.02-2ubuntu1, 0
Ubuntu:18.04:LTSgrub2-signed1.93.15, 1.86, 1.87
Ubuntu:Pro:14.04:LTSgrub2-signed1.24, 1.22, 1.23
Ubuntu:16.04:LTSgrub2-signed1.66, 0, 1.55
Ubuntu:20.04:LTSgrub2-signed0, 1.133, 1.131
Ubuntu:20.04:LTSgrub22.04-1ubuntu13, 2.04-1ubuntu12, 2.04-1ubuntu21
Ubuntu:16.04:LTSgrub2*, 2.02~beta2-36ubuntu3.14, 2.02~beta2-36ubuntu3.15
Ubuntu:16.04:LTSgrub2-unsigned0, 2.04-1ubuntu44, 2.04-1ubuntu44.1

Timeline

  • Jul 29, 2020 CVE Published
  • Jul 31, 2020 CVE Updated
  • Apr 14, 2021 EPSS Score
  • May 1, 2021 EPSS Score
  • Jun 23, 2021 EPSS Score
  • Oct 27, 2021 EPSS Score
  • Dec 29, 2021 EPSS Score
  • Jan 6, 2022 EPSS Score
  • Feb 4, 2022 EPSS Score
  • Mar 3, 2022 EPSS Score
  • May 5, 2022 EPSS Score
  • Jul 7, 2022 EPSS Score

References

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