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Ubuntu 20.04 LTS / 22.04 LTS / 23.10 : FreeRDP vulnerabilities (USN-6749-1)

critical Nessus Plugin ID 193871

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6749-1 advisory.

 - FreeRDP is a set of free and open source remote desktop protocol library and clients. In affected versions an integer overflow in `freerdp_bitmap_planar_context_reset` leads to heap-buffer overflow. This affects FreeRDP based clients. FreeRDP based server implementations and proxy are not affected. A malicious server could prepare a `RDPGFX_RESET_GRAPHICS_PDU` to allocate too small buffers, possibly triggering later out of bound read/write. Data extraction over network is not possible, the buffers are used to display an image. This issue has been addressed in version 2.11.5 and 3.2.0. Users are advised to upgrade. there are no know workarounds for this vulnerability. (CVE-2024-22211)

 - FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients using a version of FreeRDP prior to 3.5.0 or 2.11.6 are vulnerable to integer overflow and out-of-bounds write. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, do not use `/gfx` options (e.g. deactivate with `/bpp:32` or `/rfx` as it is on by default). (CVE-2024-32039)

 - FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 and have connections to servers using the `NSC` codec are vulnerable to integer underflow. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, do not use the NSC codec (e.g. use `-nsc`). (CVE-2024-32040)

 - FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 are vulnerable to out-of-bounds read. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, deactivate `/gfx` (on by default, set `/bpp` or `/rfx` options instead.
 (CVE-2024-32041)

 - FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 are vulnerable to out-of-bounds read. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, use `/gfx` or `/rfx` modes (on by default, require server side support).
 (CVE-2024-32458)

 - FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients and servers that use a version of FreeRDP prior to 3.5.0 or 2.11.6 are vulnerable to out-of-bounds read. Versions 3.5.0 and 2.11.6 patch the issue. No known workarounds are available. (CVE-2024-32459)

 - FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based based clients using `/bpp:32` legacy `GDI` drawing path with a version of FreeRDP prior to 3.5.0 or 2.11.6 are vulnerable to out-of-bounds read. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, use modern drawing paths (e.g. `/rfx` or `/gfx` options). The workaround requires server side support. (CVE-2024-32460)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-6749-1

Plugin Details

Severity: Critical

ID: 193871

File Name: ubuntu_USN-6749-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 4/25/2024

Updated: 4/26/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2024-22211

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libfreerdp-client2-2, p-cpe:/a:canonical:ubuntu_linux:libfreerdp-server2-2, p-cpe:/a:canonical:ubuntu_linux:libfreerdp2-2, p-cpe:/a:canonical:ubuntu_linux:freerdp2-dev, p-cpe:/a:canonical:ubuntu_linux:freerdp2-shadow-x11, p-cpe:/a:canonical:ubuntu_linux:freerdp2-wayland, p-cpe:/a:canonical:ubuntu_linux:freerdp2-x11, p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow-subsystem2-2, p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow2-2, p-cpe:/a:canonical:ubuntu_linux:libuwac0-0, p-cpe:/a:canonical:ubuntu_linux:libuwac0-dev, p-cpe:/a:canonical:ubuntu_linux:libwinpr-tools2-2, p-cpe:/a:canonical:ubuntu_linux:libwinpr2-2, p-cpe:/a:canonical:ubuntu_linux:libwinpr2-dev, p-cpe:/a:canonical:ubuntu_linux:winpr-utils, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:23.10

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/24/2024

Vulnerability Publication Date: 1/19/2024

Reference Information

CVE: CVE-2024-22211, CVE-2024-32039, CVE-2024-32040, CVE-2024-32041, CVE-2024-32458, CVE-2024-32459, CVE-2024-32460

IAVA: 2024-A-0259

USN: 6749-1