Alpaquita LinuxStreamSecurity Advisory
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CVE-2020-27779

Published: August 31, 2023Last modified: August 31, 2023

Description

A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Severity score breakdown

ParameterValue
Base score7.5
Attack VectorLOCAL
Attack complexityHIGH
Privileges requiredHIGH
User interactionNONE
ScopeCHANGED
ConfidentialityHIGH
Integrity impactHIGH
Availability impactHIGH
VectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSgrubNot affected (2.06-r15)
StreamgrubNot affected (2.06-r17)

References

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