title: Improper client input validation for FreeRDP gateway connections allows to overwrite memory
description: FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway.
problem types: CWE-787: Out-of-bounds Write
affected:
{
vendor: FreeRDP
product: FreeRDP
versions:
version: < 2.4.1, status: affected
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: HIGH
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: NONE
baseScore: 5.8
baseSeverity: MEDIUM
]