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CVE-2023-40187

Published: 31 August 2023

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions of the 3.x beta branch are subject to a Use-After-Free issue in the `avc420_ensure_buffer` and `avc444_ensure_buffer` functions. If the value of `piDstSize[x]` is 0, `ppYUVDstData[x]` will be freed. However, in this case `ppYUVDstData[x]` will not have been updated which leads to a Use-After-Free vulnerability. This issue has been addressed in version 3.0.0-beta3. Users of the 3.x beta releases are advised to upgrade. There are no known workarounds for this vulnerability.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
freerdp2
Launchpad, Ubuntu, Debian
trusty Ignored
(end of standard support)
xenial Ignored
(end of standard support)
upstream Needs triage

bionic Not vulnerable
(2.2.0+dfsg1-0ubuntu0.18.04.4)
focal Not vulnerable
(2.2.0+dfsg1-0ubuntu0.20.04.4)
jammy Not vulnerable
(2.6.1+dfsg1-3ubuntu2.3)
lunar Not vulnerable
(2.10.0+dfsg1-1)
mantic Not vulnerable
(2.10.0+dfsg1-1.1)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H