{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "state": "PUBLISHED", "cveId": "CVE-2021-3177", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2025-12-18T15:03:34.545Z", "dateReserved": "2021-01-19T00:00:00.000Z", "datePublished": "2021-01-19T00:00:00.000Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2023-05-24T00:00:00.000Z" }, "descriptions": [ { "lang": "en", "value": "Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely." } ], "affected": [ { "vendor": "n/a", "product": "n/a", "versions": [ { "version": "n/a", "status": "affected" } ] } ], "references": [ { "url": "https://bugs.python.org/issue42938" }, { "url": "https://github.com/python/cpython/pull/24239" }, { "url": "https://python-security.readthedocs.io/vuln/ctypes-buffer-overflow-pycarg_repr.html" }, { "name": "FEDORA-2021-faf88b9499", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MGSV6BJQLRQ6RKVUXK7JGU7TP4QFGQXC/" }, { "name": "FEDORA-2021-cc3ff94cfc", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NQPARTLNSFQVMMQHPNBFOCOZOO3TMQNA/" }, { "name": "GLSA-202101-18", "tags": [ "vendor-advisory" ], "url": "https://security.gentoo.org/glsa/202101-18" }, { "name": "FEDORA-2021-e3a5a74610", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7GZV74KM72O2PEJN2C4XP3V5Q5MZUOO/" }, { "name": "FEDORA-2021-ced31f3f0c", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCFZMVRQUKCBQIG5F2CBVADK63NFSE4A/" }, { "name": "FEDORA-2021-42ba9feb47", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRHOCQYX3QLDGDQGTWQAUUT2GGIZCZUO/" }, { "name": "FEDORA-2021-076a2dccba", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXSMBHES3ANXXS2RSO5G6Q24BR4B2PWK/" }, { "name": "FEDORA-2021-851c6e4e2d", "tags": [ "vendor-advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V6XJAULOS5JVB2L67NCKKMJ5NTKZJBSD/" }, { "name": 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"https://lists.debian.org/debian-lts-announce/2021/04/msg00005.html" }, { "url": "https://www.oracle.com//security-alerts/cpujul2021.html" }, { "url": "https://news.ycombinator.com/item?id=26185005" }, { "url": "https://security.netapp.com/advisory/ntap-20210226-0003/" }, { "url": "https://www.oracle.com/security-alerts/cpuoct2021.html" }, { "url": "https://www.oracle.com/security-alerts/cpujan2022.html" }, { "name": "[debian-lts-announce] 20220212 [SECURITY] [DLA 2919-1] python2.7 security update", "tags": [ "mailing-list" ], "url": "https://lists.debian.org/debian-lts-announce/2022/02/msg00013.html" }, { "url": "https://www.oracle.com/security-alerts/cpujul2022.html" }, { "name": "[debian-lts-announce] 20230524 [SECURITY] [DLA 3432-1] python2.7 security update", "tags": [ "mailing-list" ], "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html" } ], "problemTypes": [ { "descriptions": [ { "type": "text", "lang": "en", "description": "n/a" } ] } ] }, "adp": [ { 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"x_transferred" ], "url": "https://security.gentoo.org/glsa/202101-18" }, { "name": "FEDORA-2021-e3a5a74610", "tags": [ "vendor-advisory", "x_transferred" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7GZV74KM72O2PEJN2C4XP3V5Q5MZUOO/" }, { "name": "FEDORA-2021-ced31f3f0c", "tags": [ "vendor-advisory", "x_transferred" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCFZMVRQUKCBQIG5F2CBVADK63NFSE4A/" }, { "name": "FEDORA-2021-42ba9feb47", "tags": [ "vendor-advisory", "x_transferred" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRHOCQYX3QLDGDQGTWQAUUT2GGIZCZUO/" }, { "name": "FEDORA-2021-076a2dccba", "tags": [ "vendor-advisory", "x_transferred" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXSMBHES3ANXXS2RSO5G6Q24BR4B2PWK/" }, { "name": 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"https://lists.debian.org/debian-lts-announce/2022/02/msg00013.html" }, { "url": "https://www.oracle.com/security-alerts/cpujul2022.html", "tags": [ "x_transferred" ] }, { "name": "[debian-lts-announce] 20230524 [SECURITY] [DLA 3432-1] python2.7 security update", "tags": [ "mailing-list", "x_transferred" ], "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html" } ] }, { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-120", "lang": "en", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')" } ] } ], "metrics": [ { "cvssV3_1": { "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" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2025-12-18T15:03:29.016940Z", "id": "CVE-2021-3177", "options": [ { "Exploitation": "poc" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-12-18T15:03:34.545Z" } } ] } }