Alpaquita Linux
Security Advisory

CVE-2023-40548

Published: January 25, 2024Last modified: January 25, 2024

Description

A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.

Severity score breakdown

ParameterValue
Base score7.4
Attack VectorLOCAL
Attack complexityHIGH
Privileges requiredNONE
User interactionNONE
ScopeUNCHANGED
ConfidentialityHIGH
Integrity impactHIGH
Availability impactHIGH
VectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSshimVulnerable (15.7-r0)
shim-signedVulnerable (15.7-r0)
StreamshimFixed (15.8-r0)
shim-signedVulnerable (15.7-r0)

References

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