Security update for xrdp SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2020:1943-1 Final 1 1 2020-07-17T11:49:49Z current 2020-07-17T11:49:49Z 2020-07-17T11:49:49Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xrdp This update for xrdp provides the following fix: - CVE-2020-4044: xrdp-sesman can be crashed remotely over port 3350 (bsc#1173580). - Fixed an issue where xrdp-sesman could not restart (bsc#1155952). - Fixed an issue where xrdp could not start due to an error in the service file use absolute path in ExecStart (bsc#1155789). - Fixed a PAM error after 2nd xrdp session after logout (bsc#1153471). - Fixed a crash in xrdp-sesman, caused by terminating and reconnecting an xrdp session (bsc#1152711). - Fixed a failure in RDP session recovery (bsc#1150584). - Fixed a process leak (bsc#1144379). - Let systemd handle the daemons, fixing daemon start failures. (bsc#1138954, bsc#1144327) - Don't try to create .vnc directory if it already exists. (bsc#1157860) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2020-1943,SUSE-OpenStack-Cloud-7-2020-1943,SUSE-SLE-SAP-12-SP2-2020-1943,SUSE-SLE-SERVER-12-SP2-2020-1943,SUSE-SLE-SERVER-12-SP2-BCL-2020-1943 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2020/suse-su-20201943-1/ Link for SUSE-SU-2020:1943-1 https://lists.suse.com/pipermail/sle-security-updates/2020-July/007149.html E-Mail link for SUSE-SU-2020:1943-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1138954 SUSE Bug 1138954 https://bugzilla.suse.com/1144327 SUSE Bug 1144327 https://bugzilla.suse.com/1144379 SUSE Bug 1144379 https://bugzilla.suse.com/1150584 SUSE Bug 1150584 https://bugzilla.suse.com/1152711 SUSE Bug 1152711 https://bugzilla.suse.com/1153471 SUSE Bug 1153471 https://bugzilla.suse.com/1155789 SUSE Bug 1155789 https://bugzilla.suse.com/1155952 SUSE Bug 1155952 https://bugzilla.suse.com/1157860 SUSE Bug 1157860 https://bugzilla.suse.com/1173580 SUSE Bug 1173580 https://www.suse.com/security/cve/CVE-2017-6967/ SUSE CVE CVE-2017-6967 page https://www.suse.com/security/cve/CVE-2020-4044/ SUSE CVE CVE-2020-4044 page SUSE Linux Enterprise Server 12 SP2-BCL SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP2 SUSE OpenStack Cloud 7 xrdp-0.9.0~git.1456906198.f422461-16.20.1 xrdp-0.9.0~git.1456906198.f422461-16.20.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL xrdp-0.9.0~git.1456906198.f422461-16.20.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS xrdp-0.9.0~git.1456906198.f422461-16.20.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 xrdp-0.9.0~git.1456906198.f422461-16.20.1 as a component of SUSE OpenStack Cloud 7 xrdp 0.9.1 calls the PAM function auth_start_session() in an incorrect location, leading to PAM session modules not being properly initialized, with a potential consequence of incorrect configurations or elevation of privileges, aka a pam_limits.so bypass. CVE-2017-6967 SUSE Linux Enterprise Server 12 SP2-BCL:xrdp-0.9.0~git.1456906198.f422461-16.20.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xrdp-0.9.0~git.1456906198.f422461-16.20.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xrdp-0.9.0~git.1456906198.f422461-16.20.1 SUSE OpenStack Cloud 7:xrdp-0.9.0~git.1456906198.f422461-16.20.1 moderate 4.9 AV:N/AC:M/Au:S/C:P/I:P/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2020/suse-su-20201943-1/ https://www.suse.com/security/cve/CVE-2017-6967.html CVE-2017-6967 https://bugzilla.suse.com/1029912 SUSE Bug 1029912 https://bugzilla.suse.com/442182 SUSE Bug 442182 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. CVE-2020-4044 SUSE Linux Enterprise Server 12 SP2-BCL:xrdp-0.9.0~git.1456906198.f422461-16.20.1 SUSE Linux Enterprise Server 12 SP2-LTSS:xrdp-0.9.0~git.1456906198.f422461-16.20.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:xrdp-0.9.0~git.1456906198.f422461-16.20.1 SUSE OpenStack Cloud 7:xrdp-0.9.0~git.1456906198.f422461-16.20.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2020/suse-su-20201943-1/ https://www.suse.com/security/cve/CVE-2020-4044.html CVE-2020-4044 https://bugzilla.suse.com/1173580 SUSE Bug 1173580