description: Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.
problem types: A case of CWE-124 is occurring in PiSmmCore.
affected:
{
defaultStatus: unaffected
product: EDK II
vendor: TianoCore
versions:
status: affected, version: edk2-stable202208
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 10
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL