Vulnerability Monitor

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CVE-2020-15706

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.

Published

2020-07-29T18:15:14.420

Last Modified

2024-11-21T05:06:03.823

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.4 (MEDIUM)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:P/I:P/A:P

  • Access Vector: LOCAL
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

3.4

Impact Score

6.4

Weaknesses
  • Type: Secondary
    CWE-362
  • Type: Primary
    CWE-362
    CWE-416
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application gnu grub2 ≤ 2.04 Yes
Application redhat enterprise_linux_atomic_host - Yes
Application redhat openshift_container_platform 4.0 Yes
Operating System canonical ubuntu_linux 14.04 Yes
Operating System canonical ubuntu_linux 16.04 Yes
Operating System canonical ubuntu_linux 18.04 Yes
Operating System canonical ubuntu_linux 20.04 Yes
Operating System debian debian_linux 10.0 Yes
Operating System redhat enterprise_linux 7.0 Yes
Operating System redhat enterprise_linux 8.0 Yes
Operating System suse suse_linux_enterprise_server 11 Yes
Operating System suse suse_linux_enterprise_server 12 Yes
Operating System suse suse_linux_enterprise_server 15 Yes
Operating System microsoft windows_10 - Yes
Operating System microsoft windows_10 1607 Yes
Operating System microsoft windows_10 1709 Yes
Operating System microsoft windows_10 1803 Yes
Operating System microsoft windows_10 1809 Yes
Operating System microsoft windows_10 1903 Yes
Operating System microsoft windows_10 1909 Yes
Operating System microsoft windows_10 2004 Yes
Operating System microsoft windows_8.1 - Yes
Operating System microsoft windows_rt_8.1 - Yes
Operating System microsoft windows_server_2012 - Yes
Operating System microsoft windows_server_2012 r2 Yes
Operating System microsoft windows_server_2016 - Yes
Operating System microsoft windows_server_2016 1903 Yes
Operating System microsoft windows_server_2016 1909 Yes
Operating System microsoft windows_server_2016 2004 Yes
Operating System microsoft windows_server_2019 - Yes
Operating System opensuse leap 15.1 Yes
Operating System opensuse leap 15.2 Yes
Operating System canonical ubuntu_linux 14.04 Yes
Operating System canonical ubuntu_linux 16.04 Yes
Operating System canonical ubuntu_linux 18.04 Yes
Operating System canonical ubuntu_linux 20.04 Yes
References