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.
{"id": "CVE-2021-20230", "vendorId": null, "type": "cve", "bulletinFamily": "NVD", "title": "CVE-2021-20230", "description": "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.", "published": "2021-02-23T17:15:00", "modified": "2022-06-01T18:05:00", "epss": [{"cve": "CVE-2021-20230", "epss": 0.00099, "percentile": 0.39857, "modified": "2023-05-27"}], "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}, "cvss2": {"cvssV2": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0}, "severity": "MEDIUM", "exploitabilityScore": 10.0, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "cvss3": {"cvssV3": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}, "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-20230", "reporter": "secalert@redhat.com", "references": ["https://bugzilla.redhat.com/show_bug.cgi?id=1925226", "https://github.com/mtrojnar/stunnel/commit/ebad9ddc4efb2635f37174c9d800d06206f1edf9", "https://security.gentoo.org/glsa/202105-02"], "cvelist": ["CVE-2021-20230"], "immutableFields": [], "lastseen": "2023-05-27T14:17:19", "viewCount": 151, "enchantments": {"dependencies": {"references": [{"type": "almalinux", "idList": ["ALSA-2021:0618"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2021-20230"]}, {"type": "gentoo", "idList": ["GLSA-202105-02"]}, {"type": "mageia", "idList": ["MGASA-2021-0284"]}, {"type": "nessus", "idList": ["ALMA_LINUX_ALSA-2021-0618.NASL", "CENTOS8_RHSA-2021-0618.NASL", "EULEROS_SA-2021-1889.NASL", "GENTOO_GLSA-202105-02.NASL", "NEWSTART_CGSL_NS-SA-2021-0123_STUNNEL.NASL", "OPENSUSE-2021-409.NASL", "ORACLELINUX_ELSA-2021-0618.NASL", "REDHAT-RHSA-2021-0618.NASL", "REDHAT-RHSA-2021-0619.NASL", "REDHAT-RHSA-2021-0620.NASL", "SUSE_SU-2021-0772-1.NASL", "SUSE_SU-2021-1465-1.NASL"]}, {"type": "oraclelinux", "idList": ["ELSA-2021-0618"]}, {"type": "redhat", "idList": ["RHSA-2021:0618", "RHSA-2021:0619", "RHSA-2021:0620", "RHSA-2021:0719", "RHSA-2021:0980"]}, {"type": "redhatcve", "idList": ["RH:CVE-2021-20230"]}, {"type": "rocky", "idList": ["RLSA-2021:0618"]}, {"type": "rosalinux", "idList": ["ROSA-SA-2021-1978"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2021:0409-1"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2021-20230"]}, {"type": "veracode", "idList": ["VERACODE:29461"]}]}, "score": {"value": 2.1, "vector": "NONE"}, "twitter": {"counter": 4, "tweets": [{"link": "https://twitter.com/WolfgangSesin/status/1365558706704891907", "text": "New post from https://t.co/uXvPWJy6tj?amp=1 (CVE-2021-20230 (stunnel)) has been published on https://t.co/6byY8gLOyl?amp=1"}, {"link": "https://twitter.com/threatintelctr/status/1532062740642414592", "text": " NEW: 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 wi... (click for more) Severity: HIGH https://t.co/p15eNAU8m0", "author": "threatintelctr", "author_photo": "https://pbs.twimg.com/profile_images/904224973987840000/dMy1x9Ho_400x400.jpg"}, {"link": "https://twitter.com/LinInfoSec/status/1532105347120390144", "text": "Stunnel - CVE-2021-20230: https://t.co/Yh3GrWcpVy", "author": "LinInfoSec", "author_photo": "https://pbs.twimg.com/profile_images/806629896705507328/nxrtXOrp_400x400.jpg"}]}, "backreferences": {"references": [{"type": "almalinux", "idList": ["ALSA-2021:0618"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2021-20230"]}, {"type": "gentoo", "idList": ["GLSA-202105-02"]}, {"type": "nessus", "idList": ["CENTOS8_RHSA-2021-0618.NASL", "EULEROS_SA-2021-1889.NASL", "GENTOO_GLSA-202105-02.NASL", "REDHAT-RHSA-2021-0618.NASL", "REDHAT-RHSA-2021-0619.NASL", "REDHAT-RHSA-2021-0620.NASL", "SUSE_SU-2021-1465-1.NASL"]}, {"type": "oraclelinux", "idList": ["ELSA-2021-0618"]}, {"type": "redhat", "idList": ["RHSA-2021:0618", "RHSA-2021:0619"]}, {"type": "redhatcve", "idList": ["RH:CVE-2021-20230"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2021:0409-1"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2021-20230"]}]}, "exploitation": null, "affected_software": {"major_version": [{"name": "stunnel", "version": 5}]}, "epss": [{"cve": "CVE-2021-20230", "epss": 0.00099, "percentile": 0.39719, "modified": "2023-05-07"}], "vulnersScore": 2.1}, "_state": {"dependencies": 1685209315, "twitter": 0, "score": 1685197916, "affected_software_major_version": 0, "epss": 0}, "_internal": {"score_hash": "041b9f5d195fba2480df91489e6013b1"}, "cna_cvss": {"cna": null, "cvss": {}}, "cpe": [], "cpe23": [], "cwe": ["CWE-295"], "affectedSoftware": [{"cpeName": "stunnel:stunnel", "version": "5.57", "operator": "lt", "name": "stunnel"}], "affectedConfiguration": [], "cpeConfiguration": {"CVE_data_version": "4.0", "nodes": [{"operator": "OR", "children": [], "cpe_match": [{"vulnerable": true, "cpe23Uri": "cpe:2.3:a:stunnel:stunnel:5.57:*:*:*:*:*:*:*", "versionEndExcluding": "5.57", "cpe_name": []}]}]}, "extraReferences": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1925226", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1925226", "refsource": "MISC", "tags": ["Issue Tracking", "Third Party Advisory"]}, {"url": "https://github.com/mtrojnar/stunnel/commit/ebad9ddc4efb2635f37174c9d800d06206f1edf9", "name": "https://github.com/mtrojnar/stunnel/commit/ebad9ddc4efb2635f37174c9d800d06206f1edf9", "refsource": "MISC", "tags": ["Patch", "Third Party Advisory"]}, {"url": "https://security.gentoo.org/glsa/202105-02", "name": "GLSA-202105-02", "refsource": "GENTOO", "tags": ["Third Party Advisory"]}], "product_info": [{"vendor": "Stunnel", "product": "Stunnel"}], "solutions": [], "workarounds": [], "impacts": [], "problemTypes": [{"descriptions": [{"cweId": "CWE-295", "description": "CWE-295", "lang": "en", "type": "CWE"}]}], "exploits": [], "assigned": "1976-01-01T00:00:00"}
{"mageia": [{"lastseen": "2023-05-27T15:00:33", "description": "Updated stunnel package fixes security vulnerability: Client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230). \n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-06-23T17:11:28", "type": "mageia", "title": "Updated tunnel packages fix security vulnerability\n", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-06-23T17:11:27", "id": "MGASA-2021-0284", "href": "https://advisories.mageia.org/MGASA-2021-0284.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "redhat": [{"lastseen": "2023-05-27T14:34:28", "description": "Stunnel is a wrapper for network connections. It can be used to tunnel an unencrypted network connection over an encrypted connection (encrypted using SSL or TLS) or to provide an encrypted means of connecting to services that do not natively support encryption.\n\nSecurity Fix(es):\n\n* stunnel: client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-22T09:54:57", "type": "redhat", "title": "(RHSA-2021:0618) Important: stunnel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-22T10:09:49", "id": "RHSA-2021:0618", "href": "https://access.redhat.com/errata/RHSA-2021:0618", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-05-27T14:34:28", "description": "Stunnel is a wrapper for network connections. It can be used to tunnel an unencrypted network connection over an encrypted connection (encrypted using SSL or TLS) or to provide an encrypted means of connecting to services that do not natively support encryption.\n\nSecurity Fix(es):\n\n* stunnel: client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-22T09:56:57", "type": "redhat", "title": "(RHSA-2021:0620) Important: stunnel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-22T10:12:44", "id": "RHSA-2021:0620", "href": "https://access.redhat.com/errata/RHSA-2021:0620", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-05-27T14:34:28", "description": "Stunnel is a wrapper for network connections. It can be used to tunnel an unencrypted network connection over an encrypted connection (encrypted using SSL or TLS) or to provide an encrypted means of connecting to services that do not natively support encryption.\n\nSecurity Fix(es):\n\n* stunnel: client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-22T09:56:55", "type": "redhat", "title": "(RHSA-2021:0619) Important: stunnel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-22T10:18:51", "id": "RHSA-2021:0619", "href": "https://access.redhat.com/errata/RHSA-2021:0619", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-08-16T15:29:43", "description": "Red Hat Advanced Cluster Management for Kubernetes 2.1.5 images\n\nRed Hat Advanced Cluster Management for Kubernetes provides the\ncapabilities to address common challenges that administrators and site\nreliability engineers face as they work across a range of public and\nprivate cloud environments. Clusters and applications are all visible and\nmanaged from a single console\u2014with security policy built in.\n\nThis advisory contains the container images for Red Hat Advanced Cluster\nManagement for Kubernetes, which fix several bugs and security issues. See\nthe following Release Notes documentation, which will be updated shortly \nfor this release, for additional details about this release:\n\nhttps://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_mana\ngement_for_kubernetes/2.1/html/release_notes/\n\nSecurity fix:\n\n* golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash (CVE-2020-14040)\n\nFor more details about the security issue, including the impact, a CVSS\nscore, acknowledgments, and other related information, refer to the CVE\npage(s) listed in the References section.\n\nBug fixes:\n\n* Overview page not showing pods count of the cluster (BZ#1903446)\n\n* On new Application deployment, Ansible Prehook gets executed twice (BZ#1920654)\n\n* Go panic in multicluster-operators-hub pods when creating a helm subscription using basic auth (BZ#1925281)\n\n* RHACM 2.1.5 images (BZ#1931887)\n\n* CVE-2020-14040 grafana-dashboard-loader: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2] (BZ#1932356)\n\n* CVE-2020-14040 multicluster-monitoring-operator: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2] (BZ#1932359)\n\n* RHACM missing Canadian regions for Azure Provider (BZ#1932430)\n\n* CVE-2020-14040 configmap-watcher: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1932481)\n\n* CVE-2020-14040 governance-policy-status-sync: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1932498)\n\n* CVE-2020-14040 governance-policy-template-sync: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1932617)\n\n* CVE-2020-14040 governance-policy-spec-sync: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1932633) \n\n* CVE-2020-14040 multicloudhub-operator: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1932665)\n\n* CVE-2020-14040 multicloudhub-repo: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1932668)\n\n* CVE-2020-14040 config-policy-controller: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1933062)\n\n* CVE-2020-14040 cert-manager: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1933073)\n\n* CVE-2020-14040 cert-policy-controller: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1933104)\n\n* CVE-2020-14040 iam-policy-controller: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1933106)\n\n* CVE-2020-14040 management-ingress: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1933136)\n\n* CVE-2020-14040 governance-policy-propagator: golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash [rhacm-2.1] (BZ#1938355)", "cvss3": {"exploitabilityScore": 1.5, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "baseScore": 8.2, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 6.0}, "published": "2021-03-24T11:40:18", "type": "redhat", "title": "(RHSA-2021:0980) Moderate: Red Hat Advanced Cluster Management 2.1.5 security and bug fix update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-14040", "CVE-2020-14372", "CVE-2020-25632", "CVE-2020-25647", "CVE-2020-27749", "CVE-2020-27779", "CVE-2020-8625", "CVE-2021-20225", "CVE-2021-20230", "CVE-2021-20233"], "modified": "2021-03-24T11:41:12", "id": "RHSA-2021:0980", "href": "https://access.redhat.com/errata/RHSA-2021:0980", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-08-16T15:29:43", "description": "Red Hat Advanced Cluster Management for Kubernetes 2.0.8 images.\n\nRed Hat Advanced Cluster Management for Kubernetes provides the\ncapabilities to address common challenges that administrators and site\nreliability engineers face as they work across a range of public and\nprivate cloud environments. Clusters and applications are all visible and\nmanaged from a single console\u2014with security policy built in.\n\nThis advisory contains the container images for Red Hat Advanced Cluster\nManagement for Kubernetes, which resolve some security issues and bugs. 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'content/dist/rhel8/8/x86_64/supplementary/debug',\n 'content/dist/rhel8/8/x86_64/supplementary/os',\n 'content/dist/rhel8/8/x86_64/supplementary/source/SRPMS'\n ],\n 'pkgs': [\n {'reference':'stunnel-5.56-5.el8_3', 'release':'8', 'rpm_spec_vers_cmp':TRUE}\n ]\n }\n];\n\nvar applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);\nif(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);\n\nvar flag = 0;\nforeach var constraint_array ( constraints ) {\n var repo_relative_urls = NULL;\n if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];\n var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);\n foreach var pkg ( constraint_array['pkgs'] ) {\n var reference = NULL;\n var _release = NULL;\n var sp = NULL;\n var _cpu = NULL;\n var el_string = NULL;\n var rpm_spec_vers_cmp = NULL;\n var epoch = NULL;\n var allowmaj 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preg(pattern:\"^8([^0-9]|$)\", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);\n\nif (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);\n\ncpu = get_kb_item('Host/cpu');\nif (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);\nif ('x86_64' >!< cpu && cpu !~ \"^i[3-6]86$\" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);\n\npkgs = [\n {'reference':'stunnel-5.56-5.el8_3', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},\n {'reference':'stunnel-5.56-5.el8_3', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}\n];\n\nflag = 0;\nforeach package_array ( pkgs ) {\n reference = NULL;\n release = NULL;\n sp = NULL;\n cpu = NULL;\n el_string = NULL;\n rpm_spec_vers_cmp = NULL;\n epoch = NULL;\n allowmaj = NULL;\n rpm_prefix = NULL;\n if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];\n if (!empty_or_null(package_array['release'])) release = 'EL' + package_array['release'];\n if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];\n if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];\n if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];\n if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];\n if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];\n if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];\n if (!empty_or_null(package_array['rpm_prefix'])) rpm_prefix = package_array['rpm_prefix'];\n if (reference && release) {\n if (rpm_prefix) {\n if (rpm_exists(release:release, rpm:rpm_prefix) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;\n } else {\n if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;\n }\n }\n}\n\nif (flag)\n{\n security_report_v4(\n port : 0,\n severity : SECURITY_WARNING,\n extra : rpm_report_get()\n );\n exit(0);\n}\nelse\n{\n tested = pkg_tests_get();\n if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);\n else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'stunnel');\n}", "cvss": {"score": 0.0, "vector": "NONE"}}], "suse": [{"lastseen": "2022-11-08T06:10:38", "description": "An update that solves one vulnerability and has one errata\n is now available.\n\nDescription:\n\n 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\n This update was imported from the SUSE:SLE-15-SP2:Update update project.\n\n\nPatch Instructions:\n\n To install this openSUSE Security Update use the SUSE recommended installation methods\n like YaST online_update or \"zypper patch\".\n\n Alternatively you can run the command listed for your product:\n\n - openSUSE Leap 15.2:\n\n zypper in -t patch openSUSE-2021-409=1", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-03-14T00:00:00", "type": "suse", "title": "Security update for stunnel (important)", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-03-14T00:00:00", "id": "OPENSUSE-SU-2021:0409-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/XVLGFTQ3NKK4IRG4YXB6DPOVNR7D5IAU/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "veracode": [{"lastseen": "2022-07-26T16:36:11", "description": "stunnel has a lack of certification validation. The vulnerability exists as it does not validate 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.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-23T06:44:04", "type": "veracode", "title": "Lack Of Certificate Verification", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2022-06-01T21:04:33", "id": "VERACODE:29461", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-29461/summary", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "debiancve": [{"lastseen": "2023-05-27T15:16:33", "description": "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.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-23T17:15:00", "type": "debiancve", "title": "CVE-2021-20230", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-23T17:15:00", "id": "DEBIANCVE:CVE-2021-20230", "href": "https://security-tracker.debian.org/tracker/CVE-2021-20230", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "oraclelinux": [{"lastseen": "2021-07-28T14:24:36", "description": "[5.56-5]\n- Fix CVE-2021-20230 stunnel: client certificate not\n correctly verified when redirect and verifyChain options are used.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 3.6}, "published": "2021-02-23T00:00:00", "type": "oraclelinux", "title": "stunnel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-23T00:00:00", "id": "ELSA-2021-0618", "href": "http://linux.oracle.com/errata/ELSA-2021-0618.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "prion": [{"lastseen": "2023-08-16T00:57:39", "description": "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.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-23T17:15:00", "type": "prion", "title": "CVE-2021-20230", "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2022-06-01T18:05:00", "id": "PRION:CVE-2021-20230", "href": "https://kb.prio-n.com/vulnerability/CVE-2021-20230", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "rocky": [{"lastseen": "2023-07-24T17:29:39", "description": "An update is available for stunnel.\nThis update affects Rocky Linux 8.\nA Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list\nStunnel is a wrapper for network connections. It can be used to tunnel an unencrypted network connection over an encrypted connection (encrypted using SSL or TLS) or to provide an encrypted means of connecting to services that do not natively support encryption.\n\nSecurity Fix(es):\n\n* stunnel: client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-22T09:54:57", "type": "rocky", "title": "stunnel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-22T09:54:57", "id": "RLSA-2021:0618", "href": "https://errata.rockylinux.org/RLSA-2021:0618", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "gentoo": [{"lastseen": "2023-05-27T14:58:22", "description": "### Background\n\nThe stunnel program is designed to work as an SSL/TLS encryption wrapper between a client and a local or remote server. \n\n### Description\n\nIt was discovered that stunnel did not correctly verified the client certificate when options \u201credirect\u201d and \u201cverifyChain\u201d are used. \n\n### Impact\n\nA remote attacker could send a specially crafted certificate, possibly resulting in a breach of integrity or confidentiality. \n\n### Workaround\n\nThere is no known workaround at this time.\n\n### Resolution\n\nAll stunnel users should upgrade to the latest version:\n \n \n # emerge --sync\n # emerge --ask --oneshot --verbose \">=net-misc/stunnel-5.58\"", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-05-26T00:00:00", "type": "gentoo", "title": "stunnel: Improper certificate validation", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-05-26T00:00:00", "id": "GLSA-202105-02", "href": "https://security.gentoo.org/glsa/202105-02", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "almalinux": [{"lastseen": "2023-05-27T14:30:16", "description": "Stunnel is a wrapper for network connections. It can be used to tunnel an unencrypted network connection over an encrypted connection (encrypted using SSL or TLS) or to provide an encrypted means of connecting to services that do not natively support encryption.\n\nSecurity Fix(es):\n\n* stunnel: client certificate not correctly verified when redirect and verifyChain options are used (CVE-2021-20230)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-22T09:54:57", "type": "almalinux", "title": "Important: stunnel security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-22T09:54:57", "id": "ALSA-2021:0618", "href": "https://errata.almalinux.org/8/ALSA-2021-0618.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "ubuntucve": [{"lastseen": "2023-06-29T13:59:56", "description": "A flaw was found in stunnel before 5.57, where it improperly validates\nclient certificates when it is configured to use both redirect and\nverifyChain options. This flaw allows an attacker with a certificate signed\nby a Certificate Authority, which is not the one accepted by the stunnel\nserver, to access the tunneled service instead of being redirected to the\naddress specified in the redirect option. The highest threat from this\nvulnerability is to confidentiality.\n\n#### Notes\n\nAuthor| Note \n---|--- \n[rodrigo-zaiden](<https://launchpad.net/~rodrigo-zaiden>) | the fix for this CVE can be found in src/verify.c from the upstream commit ebad9ddc. verifyChain was added in version 5.34 (commit 8c43d2af), so releases earlier than bionic are not affected.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-02-23T00:00:00", "type": "ubuntucve", "title": "CVE-2021-20230", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-20230"], "modified": "2021-02-23T00:00:00", "id": "UB:CVE-2021-20230", "href": "https://ubuntu.com/security/CVE-2021-20230", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "rosalinux": [{"lastseen": "2023-09-08T23:12:25", "description": "Software: stunnel 4.56\nOS: Cobalt 7.9\n\nCVE-ID: CVE-2014-0016\nCVE-Crit: MEDIUM\nCVE-DESC: stunnel before 5.00 when using fork streaming does not properly update the OpenSSL pseudo-random number generator (PRNG) state, which causes subsequent children with the same process ID to use the same entropy pool and allow remote attackers to obtain private keys for EC (ECDSA) or DSA certificates. \nCVE-STATUS: Default\nCVE-REV: Default\n\nCVE-ID: CVE-2021-20230\nCVE-Crit: HIGH\nCVE-DESC: A bug was discovered in stunnel before 5.57 where it incorrectly verifies client certificates when configured to use the redirect and verifyChain parameters. This flaw allows an attacker with a certificate signed by a certificate authority that is not the one accepted by the stunnel server to access a tunneled service instead of redirecting to the address specified in the redirect parameter. The biggest threat from this vulnerability is privacy. \nCVE-STATUS: default\nCVE-REV: default\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-07-02T18:10:58", "type": "rosalinux", "title": "Advisory ROSA-SA-2021-1978", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2014-0016", "CVE-2021-20230"], "modified": "2021-07-02T18:10:58", "id": "ROSA-SA-2021-1978", "href": "https://abf.rosalinux.ru/advisories/ROSA-SA-2021-1978", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}]}
CVE-2021-20230
