Upstream information

CVE-2020-4044 at MITRE

Description

The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4.6
Vector AV:L/AC:L/Au:N/C:P/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.8 7.1
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Access Vector Local Adjacent Network
Access Complexity Low Low
Privileges Required Low None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High Low
Integrity Impact High None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1173580 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
HPE Helion Openstack 8
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
HPE-Helion-OpenStack-8-2020-1991
SUSE Enterprise Storage 4
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-Storage-4-2020-1943
SUSE Enterprise Storage 5
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-Storage-5-2020-1991
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • libpainter0 >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
Patchnames:
SUSE-SLE-Product-HPC-15-2020-1933
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • libpainter0 >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP1-2020-1933
SUSE Linux Enterprise Module for Basesystem 15 SP2
  • libpainter0 >= 0.9.13.1-4.3.1
  • librfxencode0 >= 0.9.13.1-4.3.1
  • xrdp >= 0.9.13.1-4.3.1
  • xrdp-devel >= 0.9.13.1-4.3.1
Patchnames:
SUSE-SLE-Module-Basesystem-15-SP2-2020-2142
SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-SLE-POS-12-SP2-CLIENT-2020-1943
SUSE Linux Enterprise Server 12 SP2-BCL
SUSE Linux Enterprise Server for SAP Applications 12 SP2-BCL
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-BCL-2020-1943
SUSE Linux Enterprise Server 12 SP2-ESPOS
SUSE Linux Enterprise Server for SAP Applications 12 SP2-ESPOS
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-ESPOS-2020-1943
SUSE Linux Enterprise Server 12 SP2-LTSS
SUSE Linux Enterprise Server for SAP Applications 12 SP2-LTSS
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-2020-1943
SUSE Linux Enterprise Server 12 SP3-BCL
SUSE Linux Enterprise Server for SAP Applications 12 SP3-BCL
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-BCL-2020-1991
SUSE Linux Enterprise Server 12 SP3-ESPOS
SUSE Linux Enterprise Server for SAP Applications 12 SP3-ESPOS
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-ESPOS-2020-1991
SUSE Linux Enterprise Server 12 SP3-LTSS
SUSE Linux Enterprise Server for SAP Applications 12 SP3-LTSS
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-2020-1991
SUSE Linux Enterprise Server 12 SP4-ESPOS
SUSE Linux Enterprise Server for SAP Applications 12 SP4-ESPOS
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-ESPOS-2020-1991
SUSE Linux Enterprise Server 12 SP4-LTSS
SUSE Linux Enterprise Server for SAP Applications 12 SP4-LTSS
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SERVER-12-SP4-LTSS-2020-1991
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • xrdp >= 0.9.10-3.3.1
Patchnames:
SUSE-SLE-SERVER-12-SP5-2020-1918
SUSE Linux Enterprise Server 15-LTSS
  • libpainter0 >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
Patchnames:
SUSE-SLE-Product-SLES-15-2020-1933
SUSE Linux Enterprise Server for SAP Applications 12 SP2
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-SLE-SAP-12-SP2-2020-1943
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SAP-12-SP3-2020-1991
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-SLE-SAP-12-SP4-2020-1991
SUSE Linux Enterprise Server for SAP Applications 15
  • libpainter0 >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2020-1933
SUSE OpenStack Cloud 7
  • xrdp >= 0.9.0~git.1456906198.f422461-16.20.1
Patchnames:
SUSE-OpenStack-Cloud-7-2020-1943
SUSE OpenStack Cloud 8
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-OpenStack-Cloud-8-2020-1991
SUSE OpenStack Cloud 9
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-OpenStack-Cloud-9-2020-1991
SUSE OpenStack Cloud Crowbar 8
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-8-2020-1991
SUSE OpenStack Cloud Crowbar 9
  • xrdp >= 0.9.0~git.1456906198.f422461-21.27.1
Patchnames:
SUSE-OpenStack-Cloud-Crowbar-9-2020-1991
openSUSE Leap 15.1
  • libpainter0 >= 0.9.6-lp151.4.6.1
  • libpainter0-debuginfo >= 0.9.6-lp151.4.6.1
  • librfxencode0 >= 0.9.6-lp151.4.6.1
  • librfxencode0-debuginfo >= 0.9.6-lp151.4.6.1
  • xrdp >= 0.9.6-lp151.4.6.1
  • xrdp-debuginfo >= 0.9.6-lp151.4.6.1
  • xrdp-debugsource >= 0.9.6-lp151.4.6.1
  • xrdp-devel >= 0.9.6-lp151.4.6.1
Patchnames:
openSUSE-2020-999
openSUSE Leap 15.2
  • libpainter0 >= 0.9.13.1-lp152.3.3.1
  • libpainter0-debuginfo >= 0.9.13.1-lp152.3.3.1
  • librfxencode0 >= 0.9.13.1-lp152.3.3.1
  • librfxencode0-debuginfo >= 0.9.13.1-lp152.3.3.1
  • xrdp >= 0.9.13.1-lp152.3.3.1
  • xrdp-debuginfo >= 0.9.13.1-lp152.3.3.1
  • xrdp-debugsource >= 0.9.13.1-lp152.3.3.1
  • xrdp-devel >= 0.9.13.1-lp152.3.3.1
Patchnames:
openSUSE-2020-1200

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15-ESPOS
  • libpainter0 >= 0.9.6-4.8.1
  • libpainter0-debuginfo >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • librfxencode0-debuginfo >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-debuginfo >= 0.9.6-4.8.1
  • xrdp-debugsource >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • libpainter0 >= 0.9.6-4.8.1
  • libpainter0-debuginfo >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • librfxencode0-debuginfo >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-debuginfo >= 0.9.6-4.8.1
  • xrdp-debugsource >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • libpainter0 >= 0.9.6-4.8.1
  • libpainter0-debuginfo >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • librfxencode0-debuginfo >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-debuginfo >= 0.9.6-4.8.1
  • xrdp-debugsource >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
SUSE Linux Enterprise Server 15-LTSS
  • libpainter0 >= 0.9.6-4.8.1
  • libpainter0-debuginfo >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • librfxencode0-debuginfo >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-debuginfo >= 0.9.6-4.8.1
  • xrdp-debugsource >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1
SUSE Linux Enterprise Server for SAP Applications 15
  • libpainter0 >= 0.9.6-4.8.1
  • libpainter0-debuginfo >= 0.9.6-4.8.1
  • librfxencode0 >= 0.9.6-4.8.1
  • librfxencode0-debuginfo >= 0.9.6-4.8.1
  • xrdp >= 0.9.6-4.8.1
  • xrdp-debuginfo >= 0.9.6-4.8.1
  • xrdp-debugsource >= 0.9.6-4.8.1
  • xrdp-devel >= 0.9.6-4.8.1


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise 15-SP1 Module for Basesystem xrdp Released
SUSE Linux Enterprise 15-SP2 Module for Basesystem xrdp Released
SUSE Linux Enterprise High Performance Computing 12 SP4 xrdp Affected
SUSE Linux Enterprise High Performance Computing 12 SP5 xrdp Released
SUSE Linux Enterprise High Performance Computing 15 LTSS xrdp Released
SUSE Linux Enterprise Server 11 SP3 xrdp Affected
SUSE Linux Enterprise Server 11 SP4 LTSS xrdp Affected
SUSE Linux Enterprise Server 12 SP2 BCL xrdp Released
SUSE Linux Enterprise Server 12 SP2 LTSS xrdp Released
SUSE Linux Enterprise Server 12 SP3 BCL xrdp Released
SUSE Linux Enterprise Server 12 SP3 LTSS xrdp Released
SUSE Linux Enterprise Server 12 SP4 xrdp Affected
SUSE Linux Enterprise Server 12 SP4 LTSS xrdp Released
SUSE Linux Enterprise Server 12 SP5 xrdp Released
SUSE Linux Enterprise Server 15 LTSS xrdp Released
SUSE Linux Enterprise Server ESPOS 15 xrdp Released
SUSE Linux Enterprise Server for SAP Applications 12 SP2 xrdp Released
SUSE Linux Enterprise Server for SAP Applications 12 SP3 xrdp Released
SUSE Linux Enterprise Server for SAP Applications 12 SP4 xrdp Released
SUSE Linux Enterprise Server for SAP Applications 12 SP5 xrdp Released