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.
Published 2020-07-29 18:15:14
Updated 2022-04-18 15:22:21
View at NVD,   CVE.org

Threat overview for CVE-2020-15705

Top countries where our scanners detected CVE-2020-15705
Top open port discovered on systems with this issue 53
IPs affected by CVE-2020-15705 705,646
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2020-15705!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-15705

0.08%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-15705

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.4
MEDIUM AV:L/AC:M/Au:N/C:P/I:P/A:P
3.4
6.4
NIST
6.4
MEDIUM CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
0.5
5.9
NIST
6.4
MEDIUM CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
0.5
5.9
Canonical Ltd.

CWE ids for CVE-2020-15705

References for CVE-2020-15705

Products affected by CVE-2020-15705

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