xrdp: CVSS (Max): 9.8

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.6597
                     USN-6474-1: xrdp vulnerabilities
                             10 November 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           xrdp
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-42822 CVE-2023-40184 CVE-2022-23613
                   CVE-2022-23493 CVE-2022-23484 CVE-2022-23483
                   CVE-2022-23482 CVE-2022-23481 CVE-2022-23480
                   CVE-2022-23479 CVE-2022-23478 CVE-2022-23477
                   CVE-2022-23468  

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-6474-1

Comment: CVSS (Max):  9.8 CVE-2022-23484 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: NIST
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-6474-1: xrdp vulnerabilities

8 November 2023

Several security issues were fixed in xrdp.

Releases

  o Ubuntu 22.04 LTS
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 ESM
  o Ubuntu 16.04 ESM
  o Ubuntu 14.04 ESM

Packages

  o xrdp - Remote Desktop Protocol (RDP) server

Details

It was discovered that xrdp incorrectly handled validation of
client-supplied data, which could lead to out-of-bounds reads. An attacker
could possibly use this issue to crash the program or extract sensitive
information. ( CVE-2022-23479 , CVE-2022-23481 , CVE-2022-23483 ,
CVE-2023-42822 )

It was discovered that xrdp improperly handled session establishment
errors. An attacker could potentially use this issue to bypass the
OS-level session restrictions by PAM. ( CVE-2023-40184 )

It was discovered that xrdp incorrectly handled validation of
client-supplied data, which could lead to out-of-bounds writes. An attacker
could possibly use this issue to cause memory corruption or execute
arbitrary code. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. ( CVE-2022-23468 )

It was discovered that xrdp incorrectly handled validation of
client-supplied data, which could lead to out-of-bounds reads. An attacker
could possibly use this issue to crash the program or extract sensitive
information. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS
and Ubuntu 22.04 LTS. ( CVE-2022-23480 , CVE-2022-23482 , CVE-2022-23484 )

It was discovered that xrdp incorrectly handled validation of
client-supplied data, which could lead to out-of-bounds reads. An attacker
could possibly use this issue to crash the program or extract sensitive
information. This issue only affected Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS. ( CVE-2022-23477 , CVE-2022-23493 )

It was discovered that xrdp incorrectly handled validation of
client-supplied data, which could lead to out-of-bounds writes. An attacker
could possibly use this issue to cause memory corruption or execute
arbitrary code. This issue only affected Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS. ( CVE-2022-23478 )

It was discovered that xrdp incorrectly handled validation of
client-supplied data, which could lead to out-of-bounds reads. An attacker
could possibly use this issue to crash the program or extract sensitive
information. This issue only affected Ubuntu 22.04 LTS. ( CVE-2022-23613 )

Update instructions

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

Ubuntu 22.04

  o xrdp - 0.9.17-2ubuntu2+esm1
    Available with Ubuntu Pro

Ubuntu 20.04

  o xrdp - 0.9.12-1ubuntu0.1+esm1
    Available with Ubuntu Pro

Ubuntu 18.04

  o xrdp - 0.9.5-2ubuntu0.1~esm2
    Available with Ubuntu Pro

Ubuntu 16.04

  o xrdp - 0.6.1-2ubuntu0.3+esm3
    Available with Ubuntu Pro

Ubuntu 14.04

  o xrdp - 0.6.0-1ubuntu0.1+esm3
    Available with Ubuntu Pro

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

References

  o CVE-2022-23468
  o CVE-2022-23477
  o CVE-2022-23479
  o CVE-2022-23484
  o CVE-2022-23481
  o CVE-2022-23613
  o CVE-2022-23493
  o CVE-2022-23480
  o CVE-2022-23483
  o CVE-2022-23478
  o CVE-2023-42822
  o CVE-2022-23482
  o CVE-2023-40184

- --------------------------END INCLUDED TEXT--------------------

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