Detections
Analytics

Ubuntu 18.04 ESM : FreeRDP vulnerabilities (USN-6522-2)

critical Nessus Plugin ID 186677

Language:

Synopsis

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

Description

The remote Ubuntu 18.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6522-2 advisory.

 - FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP are missing input length validation in `drive` channel. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server. This issue has been addressed in version 2.9.0 and all users are advised to upgrade. Users unable to upgrade should not use the drive redirection channel - command line options `/drive`, `+drives` or `+home-drive`. (CVE-2022-41877)

 - FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
 Affected versions are subject to an invalid offset validation leading to Out Of Bound Write. This can be triggered when the values `rect->left` and `rect->top` are exactly equal to `surface->width` and `surface->height`. eg. `rect->left` == `surface->width` && `rect->top` == `surface->height`. In practice this should cause 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. (CVE-2023-39352)

 - 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. (CVE-2023-39356)

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-6522-2

Plugin Details

Severity: Critical

ID: 186677

File Name: ubuntu_USN-6522-2.nasl

Version: 1.3

Type: local

Agent: unix

Published: 12/7/2023

Updated: 12/21/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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-2023-39352

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:18.04:-:esm, 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-client2-2, p-cpe:/a:canonical:ubuntu_linux:libfreerdp-server2-2, 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:libfreerdp2-2, 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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/7/2023

Vulnerability Publication Date: 11/16/2022

Reference Information

CVE: CVE-2022-41877, CVE-2023-39352, CVE-2023-39356

USN: 6522-2