{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/vex/2026/cve-2026-34477-els_os-tuxcare9_6esu.json" } ], "tracking": { "current_release_date": "2026-06-13T02:44:42Z", "generator": { "date": "2026-06-13T02:44:42Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-34477-ELS_OS-TUXCARE9.6ESU", "initial_release_date": "2026-04-10T16:16:00Z", "revision_history": [ { "date": "2026-04-10T16:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-06-13T02:44:42Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-34477" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "AlmaLinux 9.6", "product": { "name": "AlmaLinux 9.6", "product_id": "AlmaLinux-9.6", "product_identification_helper": { "cpe": "cpe:2.3:o:almalinux:almalinux:9.6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "AlmaLinux" } ], "category": "vendor", "name": "AlmaLinux OS Foundation" }, { "branches": [ { "branches": [ { "category": "product_name", "name": "Rocky Linux 9.6", "product": { "name": "Rocky Linux 9.6", "product_id": "Rocky Linux-9.6", "product_identification_helper": { "cpe": "cpe:2.3:o:resf:rocky_linux:9.6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Rocky Linux" } ], "category": "vendor", "name": "Rocky Linux" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "product": { "name": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_id": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/log4j@2.17.2-1.el9.tuxcare.els1?arch=noarch" } } }, { "category": "product_version", "name": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "product": { "name": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_id": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/log4j-web@2.17.2-1.el9.tuxcare.els1?arch=noarch" } } }, { "category": "product_version", "name": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "product": { "name": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_id": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/log4j-slf4j@2.17.2-1.el9.tuxcare.els1?arch=noarch" } } }, { "category": "product_version", "name": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "product": { "name": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_id": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/log4j-jcl@2.17.2-1.el9.tuxcare.els1?arch=noarch" } } } ], "category": "architecture", "name": "noarch" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of AlmaLinux 9.6", "product_id": "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "AlmaLinux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of AlmaLinux 9.6", "product_id": "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "AlmaLinux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of AlmaLinux 9.6", "product_id": "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "AlmaLinux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of AlmaLinux 9.6", "product_id": "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "AlmaLinux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "Rocky Linux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "Rocky Linux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "Rocky Linux-9.6" }, { "category": "default_component_of", "full_product_name": { "name": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch as a component of Rocky Linux 9.6", "product_id": "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch" }, "product_reference": "log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "relates_to_product_reference": "Rocky Linux-9.6" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-34477", "cwe": { "id": "CWE-297", "name": "Improper Validation of Certificate with Host Mismatch" }, "notes": [ { "category": "description", "text": "The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete: it addressed hostname verification only when enabled via the log4j2.sslVerifyHostName https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName system property, but not when configured through the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName attribute of the element.\n\nAlthough the verifyHostName configuration attribute was introduced in Log4j Core 2.12.0, it was silently ignored in all versions through 2.25.3, leaving TLS connections vulnerable to interception regardless of the configured value.\n\nA network-based attacker may be able to perform a man-in-the-middle attack when all of the following conditions are met:\n\n * An SMTP, Socket, or Syslog appender is in use.\n * TLS is configured via a nested element.\n * The attacker can present a certificate issued by a CA trusted by the appender's configured trust store, or by the default Java trust store if none is configured.\nThis issue does not affect users of the HTTP appender, which uses a separate verifyHostname https://logging.apache.org/log4j/2.x/manual/appenders/network.html#HttpAppender-attr-verifyHostName attribute that was not subject to this bug and verifies host names by default.\n\nUsers are advised to upgrade to Apache Log4j Core 2.25.4, which corrects this issue.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-34477" }, { "category": "external", "summary": "https://github.com/apache/logging-log4j2/pull/4075", "url": "https://github.com/apache/logging-log4j2/pull/4075" }, { "category": "external", "summary": "https://lists.apache.org/thread/lkx8cl46t2bvkcwfcb2pd43ygc097lq4", "url": "https://lists.apache.org/thread/lkx8cl46t2bvkcwfcb2pd43ygc097lq4" }, { "category": "external", "summary": "https://logging.apache.org/cyclonedx/vdr.xml", "url": "https://logging.apache.org/cyclonedx/vdr.xml" }, { "category": "external", "summary": "https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName", "url": "https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName" }, { "category": "external", "summary": "https://logging.apache.org/security.html#CVE-2026-34477", "url": "https://logging.apache.org/security.html#CVE-2026-34477" } ], "release_date": "2026-04-10T16:16:00Z", "scores": [ { "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1" }, "products": [ "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch" ] } ], "threats": [ { "category": "impact", "details": "Moderate" }, { "category": "impact", "date": "2026-06-12T12:56:45.732349Z", "details": "moderate", "product_ids": [ "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch", "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch" ] } ] } ] }