6.4
Medium
CVE-2020-15706 GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| grub2 in Ubuntu 2.04 | earliest → < 2.04-1ubuntu26.1 | 2.04-1ubuntu26.1 |
| grub2 in Ubuntu 2.02 | earliest → < 2.02-2ubuntu8.16 | 2.02-2ubuntu8.16 |
References
- www.eclypsium.com www.eclypsium.com
- wiki.ubuntu.com wiki.ubuntu.com
- ubuntu.com ubuntu.com
- www.debian.org www.debian.org
- portal.msrc.microsoft.com portal.msrc.microsoft.com
- access.redhat.com access.redhat.com
- www.suse.com www.suse.com
- www.suse.com www.suse.com
- www.openwall.com www.openwall.com
- lists.gnu.org lists.gnu.org
- DSA-4735 www.debian.org
- [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities www.openwall.com
- security.netapp.com security.netapp.com
- USN-4432-1 usn.ubuntu.com
- openSUSE-SU-2020:1169 lists.opensuse.org
- openSUSE-SU-2020:1168 lists.opensuse.org
- GLSA-202104-05 security.gentoo.org
Timeline
- Published
- Last modified