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This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library."}, {"lang": "es", "value": "Se descubri\u00f3 c\u00f3digo malicioso en los archivos tar ascendentes de xz, a partir de la versi\u00f3n 5.6.0. A trav\u00e9s de una serie de ofuscaciones complejas, el proceso de compilaci\u00f3n de liblzma extrae un archivo objeto premanipulado de un archivo de prueba disfrazado existente en el c\u00f3digo fuente, que luego se utiliza para modificar funciones espec\u00edficas en el c\u00f3digo de liblzma. Esto da como resultado una librer\u00eda liblzma modificada que puede ser utilizada por cualquier software vinculado a esta librer\u00eda, interceptando y modificando la interacci\u00f3n de datos con esta librer\u00eda."}], "id": "CVE-2024-3094", "lastModified": "2025-08-19T01:15:57.407", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", 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"https://xeiaso.net/notes/2024/xz-vuln/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-506"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Andres Freund for reporting this issue.", "bugzilla": {"description": "xz: malicious code in distributed source", "id": "2272210", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2272210"}, "csaw": false, "cvss3": {"cvss3_base_score": "10.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-506", "details": ["Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. \nThrough a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.", "Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. \nThrough a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library."], "name": "CVE-2024-3094", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "xz", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "xz", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "xz", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "xz", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "xz", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Not affected", "package_name": "xz", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}], "public_date": "2024-03-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-3094\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-3094\nhttps://www.openwall.com/lists/oss-security/2024/03/29/4\nhttps://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users"], "statement": "Current investigation indicates that the packages are only present in Fedora 41 and Fedora Rawhide within the Red Hat community ecosystem. \nNo versions of Red Hat Enterprise Linux (RHEL) are affected.\nThe malicious injection present in the xz versions 5.6.0 and 5.6.1 libraries is only included in the tarball download package. The Git distribution lacks the M4 macro that triggers the build of the malicious code. The second-stage artifacts are present in the Git repository for the injection during the build time, in case the malicious M4 macro is present. Without the merge into the build, the 2nd-stage file is innocuous.\nIn the finder\u2019s demonstration, it was found that it interfered with the OpenSSH daemon. While OpenSSH is not directly linked to the liblzma library, it does communicate with systemd in such a way that exposes it to the malware due to systemd linking to liblzma.", "threat_severity": "Critical"}