CVE-2023-39356

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a missing offset validation may lead to an Out Of Bound Read in the function `gdi_multi_opaque_rect`. In particular there is no code to validate if the value `multi_opaque_rect->numRectangles` is less than 45. Looping through `multi_opaque_rect->`numRectangles without proper boundary checks can lead to Out-of-Bounds Read errors which will likely lead to a crash. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
freerdp2	23.10 mantic	Fixed 2.10.0+dfsg1-1.1ubuntu1.1
	23.04 lunar	Fixed 2.10.0+dfsg1-1ubuntu0.3
	22.04 LTS jammy	Fixed 2.6.1+dfsg1-3ubuntu2.5
	20.04 LTS focal	Fixed 2.2.0+dfsg1-0ubuntu0.20.04.6
	18.04 LTS bionic	Fixed 2.2.0+dfsg1-0ubuntu0.18.04.4+esm2
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
freerdp2	Upstream: 889348a Upstream: 23db2f4

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.1 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	9.1 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-6522-1
FreeRDP vulnerabilities
29 November 2023

USN-6522-2
FreeRDP vulnerabilities
7 December 2023