CVE-2021-29921

{"id": "CVE-2021-29921", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2021-05-06T13:15:12.573", "references": [{"url": "https://bugs.python.org/issue36384", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://docs.python.org/3/library/ipaddress.html", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Misc/NEWS.d/3.8.0a4.rst", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/python/cpython/pull/12577", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/python/cpython/pull/25099", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/sickcodes", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-014.md", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://python-security.readthedocs.io/vuln/ipaddress-ipv4-leading-zeros.html", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/202305-02", "source": "cve@mitre.org"}, {"url": "https://security.netapp.com/advisory/ntap-20210622-0003/", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://sick.codes/sick-2021-014", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.oracle.com/security-alerts/cpujan2022.html", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.oracle.com/security-alerts/cpujul2022.html", "source": "cve@mitre.org"}, {"url": "https://www.oracle.com/security-alerts/cpuoct2021.html", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://bugs.python.org/issue36384", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://docs.python.org/3/library/ipaddress.html", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Misc/NEWS.d/3.8.0a4.rst", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/python/cpython/pull/12577", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/python/cpython/pull/25099", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/sickcodes", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-014.md", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://python-security.readthedocs.io/vuln/ipaddress-ipv4-leading-zeros.html", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.gentoo.org/glsa/202305-02", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.netapp.com/advisory/ntap-20210622-0003/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://sick.codes/sick-2021-014", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.oracle.com/security-alerts/cpujan2022.html", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.oracle.com/security-alerts/cpujul2022.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.oracle.com/security-alerts/cpuoct2021.html", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "descriptions": [{"lang": "en", "value": "In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) allows attackers to bypass access control that is based on IP addresses."}, {"lang": "es", "value": "En Python antes de la versiones 3,9,5, la biblioteca ipaddress maneja mal los caracteres cero iniciales en los octetos de una cadena de direcciones IP. Esto (en algunas situaciones) permite a los atacantes eludir el control de acceso que se basa en las direcciones IP"}], "lastModified": "2025-11-03T22:15:48.057", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AECFC6AC-5ECE-45F8-97F2-6D8D33C49F80", "versionEndExcluding": "3.8.12", "versionStartIncluding": "3.8.0"}, {"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "91FD0AF9-B011-4238-8CF1-BDEA0399AF82", "versionEndExcluding": "3.9.5", "versionStartIncluding": "3.9.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_automated_test_suite:1.8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "98FB24DB-AF91-48D0-9CA5-C8250D183FD5"}, {"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10323322-F6C0-4EA7-9344-736F7A80AA5F"}, {"criteria": "cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3AA09838-BF13-46AC-BB97-A69F48B73A8A"}, {"criteria": "cpe:2.3:a:oracle:graalvm:20.3.2:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "C21EB1C3-3251-4B99-9D5F-E4E089E2EC62"}, {"criteria": "cpe:2.3:a:oracle:graalvm:21.1.0:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "CA0CBB5F-6CA5-4DFC-97A3-05643F8885DB"}, {"criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}