{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"Security update for stunnel","title":"Title of the patch"},{"category":"description","text":"This update for stunnel fixes the following issues:\n\n- Security fix: [bsc#1177580, bsc#1182529, CVE-2021-20230]\n  * 'redirect' option does not properly handle 'verifyChain = yes'\n","title":"Description of the patch"},{"category":"details","text":"SUSE-2021-772,SUSE-SLE-Module-Server-Applications-15-SP2-2021-772","title":"Patchnames"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"SUSE ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"self","summary":"URL of this CSAF notice","url":"https://ftp.suse.com/pub/projects/security/csaf/suse-su-2021_0772-1.json"},{"category":"self","summary":"URL for SUSE-SU-2021:0772-1","url":"https://www.suse.com/support/update/announcement/2021/suse-su-20210772-1/"},{"category":"self","summary":"E-Mail link for SUSE-SU-2021:0772-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2021-March/008483.html"},{"category":"self","summary":"SUSE Bug 1177580","url":"https://bugzilla.suse.com/1177580"},{"category":"self","summary":"SUSE Bug 1182529","url":"https://bugzilla.suse.com/1182529"},{"category":"self","summary":"SUSE CVE CVE-2021-20230 page","url":"https://www.suse.com/security/cve/CVE-2021-20230/"}],"title":"Security update for stunnel","tracking":{"current_release_date":"2021-03-12T10:56:28Z","generator":{"date":"2021-03-12T10:56:28Z","engine":{"name":"cve-database.git:bin/generate-csaf.pl","version":"1"}},"id":"SUSE-SU-2021:0772-1","initial_release_date":"2021-03-12T10:56:28Z","revision_history":[{"date":"2021-03-12T10:56:28Z","number":"1","summary":"Current version"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_version","name":"stunnel-5.57-3.11.1.aarch64","product":{"name":"stunnel-5.57-3.11.1.aarch64","product_id":"stunnel-5.57-3.11.1.aarch64"}}],"category":"architecture","name":"aarch64"},{"branches":[{"category":"product_version","name":"stunnel-5.57-3.11.1.i586","product":{"name":"stunnel-5.57-3.11.1.i586","product_id":"stunnel-5.57-3.11.1.i586"}}],"category":"architecture","name":"i586"},{"branches":[{"category":"product_version","name":"stunnel-doc-5.57-3.11.1.noarch","product":{"name":"stunnel-doc-5.57-3.11.1.noarch","product_id":"stunnel-doc-5.57-3.11.1.noarch"}}],"category":"architecture","name":"noarch"},{"branches":[{"category":"product_version","name":"stunnel-5.57-3.11.1.ppc64le","product":{"name":"stunnel-5.57-3.11.1.ppc64le","product_id":"stunnel-5.57-3.11.1.ppc64le"}}],"category":"architecture","name":"ppc64le"},{"branches":[{"category":"product_version","name":"stunnel-5.57-3.11.1.s390x","product":{"name":"stunnel-5.57-3.11.1.s390x","product_id":"stunnel-5.57-3.11.1.s390x"}}],"category":"architecture","name":"s390x"},{"branches":[{"category":"product_version","name":"stunnel-5.57-3.11.1.x86_64","product":{"name":"stunnel-5.57-3.11.1.x86_64","product_id":"stunnel-5.57-3.11.1.x86_64"}}],"category":"architecture","name":"x86_64"},{"branches":[{"category":"product_name","name":"SUSE Linux Enterprise Module for Server Applications 15 SP2","product":{"name":"SUSE Linux Enterprise Module for Server Applications 15 SP2","product_id":"SUSE Linux Enterprise Module for Server Applications 15 SP2","product_identification_helper":{"cpe":"cpe:/o:suse:sle-module-server-applications:15:sp2"}}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"stunnel-5.57-3.11.1.aarch64 as component of SUSE Linux Enterprise Module for Server Applications 15 SP2","product_id":"SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.aarch64"},"product_reference":"stunnel-5.57-3.11.1.aarch64","relates_to_product_reference":"SUSE Linux Enterprise Module for Server Applications 15 SP2"},{"category":"default_component_of","full_product_name":{"name":"stunnel-5.57-3.11.1.ppc64le as component of SUSE Linux Enterprise Module for Server Applications 15 SP2","product_id":"SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.ppc64le"},"product_reference":"stunnel-5.57-3.11.1.ppc64le","relates_to_product_reference":"SUSE Linux Enterprise Module for Server Applications 15 SP2"},{"category":"default_component_of","full_product_name":{"name":"stunnel-5.57-3.11.1.s390x as component of SUSE Linux Enterprise Module for Server Applications 15 SP2","product_id":"SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.s390x"},"product_reference":"stunnel-5.57-3.11.1.s390x","relates_to_product_reference":"SUSE Linux Enterprise Module for Server Applications 15 SP2"},{"category":"default_component_of","full_product_name":{"name":"stunnel-5.57-3.11.1.x86_64 as component of SUSE Linux Enterprise Module for Server Applications 15 SP2","product_id":"SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.x86_64"},"product_reference":"stunnel-5.57-3.11.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Module for Server Applications 15 SP2"}]},"vulnerabilities":[{"cve":"CVE-2021-20230","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2021-20230"}],"notes":[{"category":"general","text":"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.","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.aarch64","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.ppc64le","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.s390x","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.x86_64"]},"references":[{"category":"external","summary":"CVE-2021-20230","url":"https://www.suse.com/security/cve/CVE-2021-20230"},{"category":"external","summary":"SUSE Bug 1177580 for CVE-2021-20230","url":"https://bugzilla.suse.com/1177580"},{"category":"external","summary":"SUSE Bug 1182529 for CVE-2021-20230","url":"https://bugzilla.suse.com/1182529"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.aarch64","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.ppc64le","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.s390x","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.x86_64"]}],"scores":[{"cvss_v3":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"products":["SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.aarch64","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.ppc64le","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.s390x","SUSE Linux Enterprise Module for Server Applications 15 SP2:stunnel-5.57-3.11.1.x86_64"]}],"threats":[{"category":"impact","date":"2021-03-12T10:56:28Z","details":"important"}],"title":"CVE-2021-20230"}]}