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Ubuntu Security Notice USN-6522-2
December 07, 2023

freerdp2 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in FreeRDP.

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

Details:

USN-6522-1 fixed several vulnerabilities in FreeRDP. This update provides
the corresponding update for Ubuntu 18.04 LTS.
Original advisory details:

 It was discovered that FreeRDP incorrectly handled drive redirection. If a
 user were tricked into connection to a malicious server, a remote attacker
 could use this issue to cause FreeRDP to crash, resulting in a denial of
 service, or possibly obtain sensitive information. (CVE-2022-41877)
 
 It was discovered that FreeRDP incorrectly handled certain surface updates.
 A remote attacker could use this issue to cause FreeRDP to crash, resulting
 in a denial of service, or possibly execute arbitrary code.
 (CVE-2023-39352, CVE-2023-39356)

Update instructions:

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  libfreerdp2-2                   2.2.0+dfsg1-0ubuntu0.18.04.4+esm2

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-6522-2
  https://ubuntu.com/security/notices/USN-6522-1
  CVE-2022-41877, CVE-2023-39352, CVE-2023-39356