VDB
CVE-2020-15707
CVE-2020-15707
PUBLISHED
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 0.03% · 9.6th percentile
Risk Scores
EPSS Score
0.03%
9.6th 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 |
Exploit Intelligence
- https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ (nist-nvd)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
- CVE-2008-5161 OpenSSH 4.7p1 Audit Helper Automates version checking and credential auditing of legacy OpenSSH 4.7p1 (Debian-8ubuntu1) targets by driving Metasploit’s auxiliary/scanner/ssh/ssh_login module from Python via pwntools. (github-poc)
Timeline
- Jul 29, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- May 1, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 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