Executive Summary

Informations
Name CVE-2020-15705 First vendor Publication 2020-07-29
Vendor Cve Last vendor Modification 2020-08-29

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 6.4
Base Score 6.4 Environmental Score 6.4
impact SubScore 5.9 Temporal Score 6.4
Exploitabality Sub Score 0.5
 
Attack Vector Local Attack Complexity High
Privileges Required High User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 4.4 Attack Range Local
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15705

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-347 Improper Verification of Cryptographic Signature

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7
Application 1
Application 1
Os 4
Os 1
Os 8
Os 1
Os 1
Os 2
Os 4
Os 1
Os 2
Os 3

Sources (Detail)

Source Url
CONFIRM https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
https://security.netapp.com/advisory/ntap-20200731-0008/
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
https://www.openwall.com/lists/oss-security/2020/07/29/3
DEBIAN https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
MLIST http://www.openwall.com/lists/oss-security/2020/07/29/3
REDHAT https://access.redhat.com/security/vulnerabilities/grub2bootloader
SUSE http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
https://www.suse.com/support/kb/doc/?id=000019673
UBUNTU http://ubuntu.com/security/notices/USN-4432-1
https://usn.ubuntu.com/4432-1/
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass

Alert History

If you want to see full details history, please login or register.
0
1
2
3
4
5
Date Informations
2020-09-02 17:23:12
  • Multiple Updates
2020-08-05 05:22:54
  • Multiple Updates
2020-08-03 21:23:21
  • Multiple Updates
2020-07-31 21:23:10
  • Multiple Updates
2020-07-30 05:22:50
  • Multiple Updates
2020-07-30 00:22:55
  • First insertion