VDB
CVE-2020-15707
CVE-2020-15707
PUBLISHED
CVSS 5.699999809265137 MEDIUM
Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.
EPSS 1.59% · 74.8th percentile
Risk Scores
CVSS 3.1
5.699999809265137
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
EPSS Score
1.59%
74.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | grub2-unsigned | 0, 2.04-1ubuntu44, 2.04-1ubuntu44.1 |
| Ubuntu:Pro:14.04:LTS | grub2 | 2.00-19ubuntu2, 2.02~beta2-9ubuntu1.6, 2.02~beta2-9ubuntu1.5 |
| Ubuntu:20.04:LTS | grub2-signed | 1.139, 1.138, 1.137 |
| Ubuntu:18.04:LTS | grub2 | 2.02-2ubuntu8.15, 0, 2.02~beta3-4ubuntu7 |
| Ubuntu:16.04:LTS | grub2-signed | 1.66.16, 1.66.19, 1.66.7 |
| Ubuntu:Pro:14.04:LTS | grub2-signed | 1.34.1, 1.34.3, 1.34.4 |
| Ubuntu:20.04:LTS | grub2 | 2.04-1ubuntu22, 2.04-1ubuntu21, 2.04-1ubuntu20 |
| Ubuntu:18.04:LTS | grub2-signed | 1.93.3, 1.91, 1.87 |
| Ubuntu:16.04:LTS | grub2 | 2.02~beta2-36ubuntu3.11, 2.02~beta2-36ubuntu3.9, 2.02~beta2-36ubuntu3.7 |
Timeline
- Jul 29, 2020 CVE Published
- 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 2, 2022 EPSS Score
- May 4, 2022 EPSS Score
- Jul 6, 2022 EPSS Score
- Sep 8, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-15707 third-party-advisory
- https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ third-party-advisory
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass third-party-advisory
- https://www.openwall.com/lists/oss-security/2020/07/29/3 third-party-advisory
- https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html third-party-advisory
- https://ubuntu.com/security/notices/USN-4432-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-15707 third-party-advisory