ISOMAN

CVE

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.

Severity
MEDIUM
CVSS
6.4
Published
Modified
NVD detailAll CVEs

Linked Releases

DistributionReleaseStatusEvidence
Ubuntu20.04.6 amd64 desktopunknownsource
Ubuntu20.04.6 amd64 live-serverunknownsource
Ubuntu18.04.6 amd64 desktopunknownsource
Ubuntu18.04.6 amd64 live-serverunknownsource
Ubuntu16.04.7 amd64 desktopunknownsource
Ubuntu16.04.6 i386 desktopunknownsource
Ubuntu16.04.7 amd64 serverunknownsource
Ubuntu16.04.6 i386 serverunknownsource

References

  1. http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
  2. http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
  3. http://ubuntu.com/security/notices/USN-4432-1
  4. http://www.openwall.com/lists/oss-security/2020/07/29/3
  5. https://access.redhat.com/security/vulnerabilities/grub2bootloader
  6. https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
  7. https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
  8. https://security.gentoo.org/glsa/202104-05
  9. https://security.netapp.com/advisory/ntap-20200731-0008/
  10. https://usn.ubuntu.com/4432-1/
  11. https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
  12. https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
  13. https://www.debian.org/security/2020/dsa-4735
  14. https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
  15. https://www.openwall.com/lists/oss-security/2020/07/29/3
  16. https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
  17. https://www.suse.com/support/kb/doc/?id=000019673
  18. http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
  19. http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
  20. http://ubuntu.com/security/notices/USN-4432-1