A FreeRDP security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.

USN-5734-1: FreeRDP vulnerabilities

==========================================================================
Ubuntu Security Notice USN-5734-1
November 22, 2022

freerdp2 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in FreeRDP.

Software Description:
- freerdp2: RDP client for Windows Terminal Services

Details:

It was discovered that FreeRDP incorrectly handled certain data lenghts. A
malicious server could use this issue to cause FreeRDP clients to crash,
resulting in a denial of service, or possibly obtain sensitive information.
This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu
22.04 LTS. (CVE-2022-39282, CVE-2022-39283)

It was discovered that FreeRDP incorrectly handled certain data lenghts. A
malicious server could use this issue to cause FreeRDP clients to crash,
resulting in a denial of service, or possibly obtain sensitive information.
(CVE-2022-39316, CVE-2022-39317, CVE-2022-39318, CVE-2022-39319,
CVE-2022-39320)

It was discovered that FreeRDP incorrectly handled certain path checks. A
malicious server could use this issue to cause FreeRDP clients to read
files outside of the shared directory. (CVE-2022-39347)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.10:
libfreerdp-client2-2 2.8.1+dfsg1-0ubuntu1.1
libfreerdp-server2-2 2.8.1+dfsg1-0ubuntu1.1

Ubuntu 22.04 LTS:
libfreerdp-client2-2 2.6.1+dfsg1-3ubuntu2.3
libfreerdp-server2-2 2.6.1+dfsg1-3ubuntu2.3

Ubuntu 20.04 LTS:
libfreerdp-client2-2 2.2.0+dfsg1-0ubuntu0.20.04.4
libfreerdp-server2-2 2.2.0+dfsg1-0ubuntu0.20.04.4

Ubuntu 18.04 LTS:
libfreerdp-client2-2 2.2.0+dfsg1-0ubuntu0.18.04.4
libfreerdp-server2-2 2.2.0+dfsg1-0ubuntu0.18.04.4

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5734-1
CVE-2022-39282, CVE-2022-39283, CVE-2022-39316, CVE-2022-39317,
CVE-2022-39318, CVE-2022-39319, CVE-2022-39320, CVE-2022-39347

Package Information:
https://launchpad.net/ubuntu/+source/freerdp2/2.8.1+dfsg1-0ubuntu1.1
https://launchpad.net/ubuntu/+source/freerdp2/2.6.1+dfsg1-3ubuntu2.3
https://launchpad.net/ubuntu/+source/freerdp2/2.2.0+dfsg1-0ubuntu0.20.04.4
https://launchpad.net/ubuntu/+source/freerdp2/2.2.0+dfsg1-0ubuntu0.18.04.4