CVE-2020-14343

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{"affected": [{"affectedData": [{"product": "PyYAML", "vendor": "n/a", "versions": [{"status": "affected", "version": "PyYAML 5.4"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:pyyaml:pyyaml:*:*:*:*:*:*:*:*", "matchCriteriaId": "5B49BB31-68E9-4F02-8D00-925418F7372C", "versionEndExcluding": "5.4", "versionStartIncluding": "5.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*", "matchCriteriaId": "C2A5B24D-BDF2-423C-98EA-A40778C01A05", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:*", "matchCriteriaId": "04E6C8E9-2024-496C-9BFD-4548A5B44E2E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747."}, {"lang": "es", "value": "Se detect\u00f3 una vulnerabilidad en la biblioteca PyYAML en versiones anteriores a 5.4, donde es susceptible una ejecuci\u00f3n de c\u00f3digo arbitrario cuando se procesan archivos YAML no confiables por medio del m\u00e9todo full_load o con el cargador FullLoader. Unas aplicaciones que usan la biblioteca para procesar entradas que no son confiables pueden ser vulnerables a este fallo. Este fallo le permite a un atacante ejecutar c\u00f3digo arbitrario en el sistema abusando del constructor python/object/new. Este fallo se debe a una correcci\u00f3n incompleta para CVE-2020-1747"}], "id": "CVE-2020-14343", "lastModified": "2026-06-17T02:54:34.453", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 10.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-02-09T21:15:12.707", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1860466"}, {"source": "secalert@redhat.com", "url": "https://github.com/SeldonIO/seldon-core/issues/2252"}, {"source": "secalert@redhat.com", "url": "https://github.com/yaml/pyyaml/issues/420"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpujul2022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1860466"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/SeldonIO/seldon-core/issues/2252"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/yaml/pyyaml/issues/420"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpujul2022.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:2583", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "python38:3.8-8040020210420090415.6dfe838a", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-06-29T00:00:00Z"}, {"advisory": "RHSA-2021:2583", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "python38-devel:3.8-8040020210420090415.6dfe838a", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-06-29T00:00:00Z"}, {"advisory": "RHSA-2021:4702", "cpe": "cpe:/a:redhat:satellite:6.10::el7", "package": "python-pyyaml-0:5.4.1-1.el7pc", "product_name": "Red Hat Satellite 6.10 for RHEL 7", "release_date": "2021-11-16T00:00:00Z"}, {"advisory": "RHSA-2021:4702", "cpe": "cpe:/a:redhat:satellite_capsule:6.10::el7", "package": "python-pyyaml-0:5.4.1-1.el7pc", "product_name": "Red Hat Satellite 6.10 for RHEL 7", "release_date": "2021-11-16T00:00:00Z"}], "bugzilla": {"description": "PyYAML: incomplete fix for CVE-2020-1747", "id": "1860466", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1860466"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.", "A vulnerability was discovered in the PyYAML library, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747."], "mitigation": {"lang": "en:us", "value": "Use `yaml.safe_load` or the SafeLoader loader when you parse untrusted input."}, "name": "CVE-2020-14343", "package_state": [{"cpe": "cpe:/a:redhat:ansible_tower:3", "fix_state": "Not affected", "package_name": "python3-PyYAML", "product_name": "Red Hat Ansible Tower 3"}, {"cpe": "cpe:/a:redhat:ansible_tower:3", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat Ansible Tower 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python27:2.7/PyYAML", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python39:3.9/PyYAML", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openstack:10", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat OpenStack Platform 10 (Newton)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Not affected", "package_name": "PyYAML", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Not affected", "package_name": "quay", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "python27-PyYAML", "product_name": "Red Hat Software Collections"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "rh-python36-PyYAML", "product_name": "Red Hat Software Collections"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Will not fix", "package_name": "rh-python38-PyYAML", "product_name": "Red Hat Software Collections"}], "public_date": "2020-07-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-14343\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-14343\nhttps://github.com/advisories/GHSA-8q59-q68h-6hv4"], "statement": "This CVE has already been fixed in RHEL-9 with initial release of PyYaml v5.4-1.\nAnsible Tower 3.7 uses affected version of PyYAML 3.12 from RHEL, but the use of load() is specified with a SafeLoader when it is called. So Ansible Tower and Ansible Engine are not affected.\nRed Hat Quay, from version 3.4 uses the safe_load function which is not affected by this issue. See [1].\nEven though the CVSSv3 for this flaw is 9.8, the Impact has been set to Moderate because PyYAML provides a specific method to deal with untrusted input, which is `yaml.safe_load`. `yaml.safe_load` or the SafeLoader loader should be used whenever the input YAML can be modified by a malicious user.\n[1] https://github.com/quay/quay/pull/603", "threat_severity": "Moderate"}

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