CVE-2021-20230 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2021-20230 Interim 1 39 2023-09-10T23:41:35Z current 2021-05-30T14:47:12Z 2023-09-10T23:41:35Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2021-20230 A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.suse.com/pipermail/sle-security-updates/2021-March/008483.html E-Mail link for SUSE-SU-2021:0772-1 https://lists.suse.com/pipermail/sle-security-updates/2021-May/008719.html E-Mail link for SUSE-SU-2021:1465-1 https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/XVLGFTQ3NKK4IRG4YXB6DPOVNR7D5IAU/ E-Mail link for openSUSE-SU-2021:0409-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings HPE Helion OpenStack 8 SUSE CaaS Platform 4.0 SUSE Enterprise Storage 6 SUSE Enterprise Storage 7 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise High Performance Computing 12 SP5 SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP5 SUSE Linux Enterprise High Performance Computing 15-ESPOS SUSE Linux Enterprise High Performance Computing 15-LTSS SUSE Linux Enterprise Point of Service 11 SP3 SUSE Linux Enterprise Server 11 SP1 for Teradata SUSE Linux Enterprise Server 11 SP3 for Teradata SUSE Linux Enterprise Server 11 SP4 LTSS SUSE Linux Enterprise Server 12 SP2-BCL SUSE Linux Enterprise Server 12 SP3-BCL SUSE Linux Enterprise Server 12 SP3-ESPOS SUSE Linux Enterprise Server 12 SP3-LTSS SUSE Linux Enterprise Server 12 SP3-TERADATA SUSE Linux Enterprise Server 12 SP4-ESPOS SUSE Linux Enterprise Server 12 SP4-LTSS SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server 15 SP1-BCL SUSE Linux Enterprise Server 15 SP1-LTSS SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Server 15 SP2-LTSS SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP5 SUSE Linux Enterprise Server 15-LTSS SUSE Linux Enterprise Server Teradata 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SUSE Linux Enterprise Server for SAP Applications 15 SP1 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Server for SAP Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Linux Enterprise Module for Server Applications 15 SP5 SUSE Manager Proxy 4.0 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Manager Retail Branch Server 4.0 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE Manager Server 4.0 SUSE Linux Enterprise Module for Server Applications 15 SP2 SUSE Linux Enterprise Module for Server Applications 15 SP3 SUSE Linux Enterprise Module for Server Applications 15 SP4 SUSE OpenStack Cloud 8 SUSE OpenStack Cloud 9 SUSE OpenStack Cloud Crowbar 8 SUSE OpenStack Cloud Crowbar 9 openSUSE Leap 15.2 stunnel stunnel-5.44-3.8.1 stunnel-5.57-3.11.1 stunnel-5.57-lp152.2.6.1 stunnel-5.62-10.3.1 stunnel-doc-5.57-lp152.2.6.1 stunnel-5.44-3.8.1 as a component of SUSE CaaS Platform 4.0 stunnel-5.44-3.8.1 as a component of SUSE Enterprise Storage 6 stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise High Performance Computing 15-ESPOS stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise High Performance Computing 15-LTSS stunnel-5.57-3.11.1 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP2 stunnel-5.57-3.11.1 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP3 stunnel-5.57-3.11.1 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP4 stunnel-5.57-3.11.1 as a component of SUSE Linux Enterprise Module for Server Applications 15 SP5 stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise Server 15 SP1-BCL stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise Server 15 SP1-LTSS stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise Server 15-LTSS stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise Server for SAP Applications 15 stunnel-5.44-3.8.1 as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP1 stunnel-5.44-3.8.1 as a component of SUSE Manager Proxy 4.0 stunnel-5.44-3.8.1 as a component of SUSE Manager Retail Branch Server 4.0 stunnel-5.44-3.8.1 as a component of SUSE Manager Server 4.0 stunnel-5.57-lp152.2.6.1 as a component of openSUSE Leap 15.2 stunnel-doc-5.57-lp152.2.6.1 as a component of openSUSE Leap 15.2 stunnel-5.62-10.3.1 as a component of SUSE Linux Enterprise Server 12 SP3-TERADATA stunnel as a component of HPE Helion OpenStack 8 stunnel as a component of SUSE CaaS Platform 4.0 stunnel as a component of SUSE Enterprise Storage 7 stunnel as a component of SUSE Linux Enterprise High Performance Computing 12 SP5 stunnel as a component of SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS stunnel as a component of SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS stunnel as a component of SUSE Linux Enterprise Module for Server Applications 15 SP4 stunnel as a component of SUSE Linux Enterprise Point of Service 11 SP3 stunnel as a component of SUSE Linux Enterprise Server 11 SP1 for Teradata stunnel as a component of SUSE Linux Enterprise Server 11 SP3 for Teradata stunnel as a component of SUSE Linux Enterprise Server 11 SP4 LTSS stunnel as a component of SUSE Linux Enterprise Server 12 SP2-BCL stunnel as a component of SUSE Linux Enterprise Server 12 SP3-BCL stunnel as a component of SUSE Linux Enterprise Server 12 SP3-ESPOS stunnel as a component of SUSE Linux Enterprise Server 12 SP3-LTSS stunnel as a component of SUSE Linux Enterprise Server 12 SP4-ESPOS stunnel as a component of SUSE Linux Enterprise Server 12 SP4-LTSS stunnel as a component of SUSE Linux Enterprise Server 12 SP5 stunnel as a component of SUSE Linux Enterprise Server 15 SP1-LTSS stunnel as a component of SUSE Linux Enterprise Server 15 SP2-LTSS stunnel as a component of SUSE Linux Enterprise Server Teradata 12 SP3 stunnel as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 stunnel as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP4 stunnel as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP5 stunnel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP1 stunnel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP2 stunnel as a component of SUSE OpenStack Cloud 8 stunnel as a component of SUSE OpenStack Cloud 9 stunnel as a component of SUSE OpenStack Cloud Crowbar 8 stunnel as a component of SUSE OpenStack Cloud Crowbar 9 A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality. CVE-2021-20230 SUSE CaaS Platform 4.0:stunnel-5.44-3.8.1 SUSE Enterprise Storage 6:stunnel-5.44-3.8.1 SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS:stunnel-5.44-3.8.1 SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS:stunnel-5.44-3.8.1 SUSE Linux Enterprise High Performance Computing 15-ESPOS:stunnel-5.44-3.8.1 SUSE Linux Enterprise High Performance Computing 15-LTSS:stunnel-5.44-3.8.1 SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP3:stunnel-doc-5.57-3.11.1 SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP4:stunnel-doc-5.57-3.11.1 SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP5:stunnel-doc-5.57-3.11.1 SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1 SUSE Linux Enterprise Module for Server Applications 15 SP3:stunnel-5.57-3.11.1 SUSE Linux Enterprise Module for Server Applications 15 SP4:stunnel-5.57-3.11.1 SUSE Linux Enterprise Module for Server Applications 15 SP5:stunnel-5.57-3.11.1 SUSE Linux Enterprise Server 15 SP1-BCL:stunnel-5.44-3.8.1 SUSE Linux Enterprise Server 15 SP1-LTSS:stunnel-5.44-3.8.1 SUSE Linux Enterprise Server 15-LTSS:stunnel-5.44-3.8.1 SUSE Linux Enterprise Server for SAP Applications 15:stunnel-5.44-3.8.1 SUSE Linux Enterprise Server for SAP Applications 15 SP1:stunnel-5.44-3.8.1 SUSE Manager Proxy 4.0:stunnel-5.44-3.8.1 SUSE Manager Retail Branch Server 4.0:stunnel-5.44-3.8.1 SUSE Manager Server 4.0:stunnel-5.44-3.8.1 openSUSE Leap 15.2:stunnel-5.57-lp152.2.6.1 openSUSE Leap 15.2:stunnel-doc-5.57-lp152.2.6.1 SUSE Linux Enterprise Server 12 SP3-TERADATA:stunnel-5.62-10.3.1 HPE Helion OpenStack 8:stunnel SUSE Linux Enterprise High Performance Computing 12 SP5:stunnel SUSE Linux Enterprise Point of Service 11 SP3:stunnel SUSE Linux Enterprise Server 11 SP1 for Teradata:stunnel SUSE Linux Enterprise Server 11 SP3 for Teradata:stunnel SUSE Linux Enterprise Server 11 SP4 LTSS:stunnel SUSE Linux Enterprise Server 12 SP2-BCL:stunnel SUSE Linux Enterprise Server 12 SP3-BCL:stunnel SUSE Linux Enterprise Server 12 SP3-ESPOS:stunnel SUSE Linux Enterprise Server 12 SP3-LTSS:stunnel SUSE Linux Enterprise Server 12 SP4-ESPOS:stunnel SUSE Linux Enterprise Server 12 SP4-LTSS:stunnel SUSE Linux Enterprise Server 12 SP5:stunnel SUSE Linux Enterprise Server Teradata 12 SP3:stunnel SUSE Linux Enterprise Server for SAP Applications 12 SP3:stunnel SUSE Linux Enterprise Server for SAP Applications 12 SP4:stunnel SUSE Linux Enterprise Server for SAP Applications 12 SP5:stunnel SUSE OpenStack Cloud 8:stunnel SUSE OpenStack Cloud 9:stunnel SUSE OpenStack Cloud Crowbar 8:stunnel SUSE OpenStack Cloud Crowbar 9:stunnel SUSE CaaS Platform 4.0:stunnel SUSE Enterprise Storage 7:stunnel SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS:stunnel SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS:stunnel SUSE Linux Enterprise Module for Server Applications 15 SP4:stunnel SUSE Linux Enterprise Server 15 SP1-LTSS:stunnel SUSE Linux Enterprise Server 15 SP2-LTSS:stunnel SUSE Linux Enterprise Server for SAP Applications 15 SP1:stunnel SUSE Linux Enterprise Server for SAP Applications 15 SP2:stunnel important 5 AV:N/AC:L/Au:N/C:P/I:N/A:N 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N