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CVE-2021-41160

Published: 21 October 2021

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a malicious server might trigger out of bound writes in a connected client. Connections using GDI or SurfaceCommands to send graphics updates to the client might send `0` width/height or out of bound rectangles to trigger out of bound writes. With `0` width or heigth the memory allocation will be `0` but the missing bounds checks allow writing to the pointer at this (not allocated) region. This issue has been patched in FreeRDP 2.4.1.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
freerdp
Launchpad, Ubuntu, Debian
bionic Needs triage

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Needs triage

freerdp2
Launchpad, Ubuntu, Debian
bionic
Released (2.2.0+dfsg1-0ubuntu0.18.04.2)
focal
Released (2.2.0+dfsg1-0ubuntu0.20.04.2)
hirsute
Released (2.3.0+dfsg1-1ubuntu0.1)
impish
Released (2.3.0+dfsg1-2ubuntu0.1)
jammy
Released (2.3.0+dfsg1-2ubuntu2)
kinetic
Released (2.3.0+dfsg1-2ubuntu2)
lunar
Released (2.3.0+dfsg1-2ubuntu2)
mantic
Released (2.3.0+dfsg1-2ubuntu2)
noble
Released (2.3.0+dfsg1-2ubuntu2)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)
Patches:
upstream: https://github.com/FreeRDP/FreeRDP/commit/217e0caa181fc1690cf84dd6a3ba1a4f90c02692

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H