VDB
CVE-2020-15705
CVE-2020-15705
PUBLISHED
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
EPSS 0.02% · 6.9th percentile
Risk Scores
EPSS Score
0.02%
6.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | grub2 | 0, *, * |
| Ubuntu:18.04:LTS | grub2-signed | 1.93.1, 0, 1.85 |
| Ubuntu:18.04:LTS | grub2 | 2.02-2ubuntu1, 2.02-2ubuntu4, 2.02-2ubuntu8.7 |
| Ubuntu:16.04:LTS | grub2-signed | 1.66.2, 1.66.1, 1.64 |
| Ubuntu:Pro:14.04:LTS | grub2-signed | 1.34.9, 0, 1.22 |
| Ubuntu:Pro:14.04:LTS | grub2 | 2.02~beta2-9ubuntu1.8, 2.02~beta2-9ubuntu1.7, 2.02~beta2-9ubuntu1.6 |
| Ubuntu:20.04:LTS | grub2 | 2.04-1ubuntu13, 2.04-1ubuntu26, 2.04-1ubuntu25 |
| Ubuntu:16.04:LTS | grub2-unsigned | 2.04-1ubuntu44, 2.04-1ubuntu44.1, 2.04-1ubuntu44.1.2 |
| Ubuntu:20.04:LTS | grub2-signed | 1.135, 1.134, 1.133 |
Exploit Intelligence
- 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
- Aug 24, 2021 EPSS Score
- Sep 17, 2021 EPSS Score
- Sep 18, 2021 EPSS Score
- Oct 11, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-15705 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-2020-15705 third-party-advisory