Detections
Analytics

Oracle Linux 8 : freerdp (ELSA-2021-4622)

high Nessus Plugin ID 155567

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-4622 advisory.

 - FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
 All FreeRDP clients prior to version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate input data. A malicious gateway might allow client memory to be written out of bounds. This issue has been resolved in version 2.4.1. If you are unable to update then use `/gt:http` rather than /gt:rdp connections if possible or use a direct connection without a gateway. (CVE-2021-41159)

 - 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. (CVE-2021-41160)

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

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2021-4622.html

Plugin Details

Severity: High

ID: 155567

File Name: oraclelinux_ELSA-2021-4622.nasl

Version: 1.2

Type: local

Agent: unix

Published: 11/18/2021

Updated: 11/18/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2021-41160

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:freerdp, p-cpe:/a:oracle:linux:freerdp-devel, p-cpe:/a:oracle:linux:freerdp-libs, p-cpe:/a:oracle:linux:libwinpr, p-cpe:/a:oracle:linux:libwinpr-devel

Required KB Items: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled

Exploit Ease: No known exploits are available

Patch Publication Date: 11/18/2021

Vulnerability Publication Date: 10/21/2021

Reference Information

CVE: CVE-2021-41159, CVE-2021-41160