cvelist/2024/12xxx/CVE-2024-12254.json

{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-12254",
        "ASSIGNER": "cna@python.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines()\n method would not \"pause\" writing and signal to the Protocol to drain \nthe buffer to the wire once the write buffer reached the \"high-water \nmark\". Because of this, Protocols would not periodically drain the write\n buffer potentially leading to memory exhaustion.\n\n\n\n\n\nThis\n vulnerability likely impacts a small number of users, you must be using\n Python 3.12.0 or later, on macOS or Linux, using the asyncio module \nwith protocols, and using .writelines() method which had new \nzero-copy-on-write behavior in Python 3.12.0 and later. If not all of \nthese factors are true then your usage of Python is unaffected."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400 Uncontrolled Resource Consumption",
                        "cweId": "CWE-400"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-770 Allocation of Resources Without Limits or Throttling",
                        "cweId": "CWE-770"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Python Software Foundation",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "CPython",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "3.12.0",
                                            "version_value": "3.14.0a3"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://github.com/python/cpython/issues/127655",
                "refsource": "MISC",
                "name": "https://github.com/python/cpython/issues/127655"
            },
            {
                "url": "https://github.com/python/cpython/pull/127656",
                "refsource": "MISC",
                "name": "https://github.com/python/cpython/pull/127656"
            },
            {
                "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/",
                "refsource": "MISC",
                "name": "https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/"
            },
            {
                "url": "https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82",
                "refsource": "MISC",
                "name": "https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82"
            },
            {
                "url": "https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5",
                "refsource": "MISC",
                "name": "https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5"
            },
            {
                "url": "https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786",
                "refsource": "MISC",
                "name": "https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786"
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.2.0"
    },
    "source": {
        "discovery": "UNKNOWN"
    },
    "credits": [
        {
            "lang": "en",
            "value": "J. Nick Koston"
        },
        {
            "lang": "en",
            "value": "Seth Larson"
        }
    ]
}