CVE-2024-12254 (GCVE-0-2024-12254)

Vulnerability from cvelistv5 – Published: 2024-12-06 15:19 – Updated: 2025-04-04 23:03
VLAI
Title
Unbounded memory buffering in SelectorSocketTransport.writelines()
Summary
Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines() method would not "pause" writing and signal to the Protocol to drain the buffer to the wire once the write buffer reached the "high-water mark". Because of this, Protocols would not periodically drain the write buffer potentially leading to memory exhaustion. This vulnerability likely impacts a small number of users, you must be using Python 3.12.0 or later, on macOS or Linux, using the asyncio module with protocols, and using .writelines() method which had new zero-copy-on-write behavior in Python 3.12.0 and later. If not all of these factors are true then your usage of Python is unaffected.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
PSF
References
Impacted products
Vendor Product Version
Python Software Foundation CPython Affected: 3.12.0 , < 3.12.9 (python)
Affected: 3.13.0 , < 3.13.2 (python)
Affected: 3.14.0a1 , < 3.14.0a3 (python)
Create a notification for this product.
python_software_foundation cpython Affected: 3.12.0 , < 3.14.0a1 (python)
    cpe:2.3:a:python_software_foundation:cpython:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
J. Nick Koston Seth Larson
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:python_software_foundation:cpython:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "cpython",
            "vendor": "python_software_foundation",
            "versions": [
              {
                "lessThan": "3.14.0a1",
                "status": "affected",
                "version": "3.12.0",
                "versionType": "python"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-12254",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-12-06T15:35:11.234951Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-05T16:54:28.955Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-04-04T23:03:00.653Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2024/12/06/1"
          },
          {
            "url": "https://security.netapp.com/advisory/ntap-20250404-0010/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "asyncio"
          ],
          "platforms": [
            "MacOS",
            "Linux"
          ],
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.12.9",
              "status": "affected",
              "version": "3.12.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.13.2",
              "status": "affected",
              "version": "3.13.0",
              "versionType": "python"
            },
            {
              "lessThan": "3.14.0a3",
              "status": "affected",
              "version": "3.14.0a1",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "J. Nick Koston"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Seth Larson"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eStarting 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.\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThis\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.\u003c/div\u003e\u003cbr\u003e"
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400 Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-02-04T20:38:34.082Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/python/cpython/issues/127655"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/pull/127656"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Unbounded memory buffering in SelectorSocketTransport.writelines()",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2024-12254",
    "datePublished": "2024-12-06T15:19:41.576Z",
    "dateReserved": "2024-12-05T16:17:55.154Z",
    "dateUpdated": "2025-04-04T23:03:00.653Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-12254",
      "date": "2026-06-22",
      "epss": "0.01844",
      "percentile": "0.7625"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"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.\"}, {\"lang\": \"es\", \"value\": \"Starting de Python 3.12.0, el m\\u00e9todo asyncio._SelectorSocketTransport.writelines() no \\\"pausaba\\\" la escritura ni enviaba se\\u00f1ales al protocolo para que vaciara el b\\u00fafer hacia el cable una vez que el b\\u00fafer de escritura alcanzaba el \\\"l\\u00edmite superior\\\". Debido a esto, los protocolos no vaciaban peri\\u00f3dicamente el b\\u00fafer de escritura, lo que podr\\u00eda provocar el agotamiento de la memoria. Es probable que esta vulnerabilidad afecte a una peque\\u00f1a cantidad de usuarios. Debes usar Python 3.12.0 o posterior, en macOS o Linux, usar el m\\u00f3dulo asyncio con protocolos y usar el m\\u00e9todo .writelines(), que ten\\u00eda un nuevo comportamiento de copia cero al escribir en Python 3.12.0 y posterior. Si no se cumplen todos estos factores, tu uso de Python no se ve afectado.\"}]",
      "id": "CVE-2024-12254",
      "lastModified": "2025-01-06T18:15:18.713",
      "metrics": "{\"cvssMetricV40\": [{\"source\": \"cna@python.org\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"4.0\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\", \"baseScore\": 8.7, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"vulnerableSystemConfidentiality\": \"NONE\", \"vulnerableSystemIntegrity\": \"NONE\", \"vulnerableSystemAvailability\": \"HIGH\", \"subsequentSystemConfidentiality\": \"NONE\", \"subsequentSystemIntegrity\": \"NONE\", \"subsequentSystemAvailability\": \"NONE\", \"exploitMaturity\": \"NOT_DEFINED\", \"confidentialityRequirements\": \"NOT_DEFINED\", \"integrityRequirements\": \"NOT_DEFINED\", \"availabilityRequirements\": \"NOT_DEFINED\", \"modifiedAttackVector\": \"NOT_DEFINED\", \"modifiedAttackComplexity\": \"NOT_DEFINED\", \"modifiedAttackRequirements\": \"NOT_DEFINED\", \"modifiedPrivilegesRequired\": \"NOT_DEFINED\", \"modifiedUserInteraction\": \"NOT_DEFINED\", \"modifiedVulnerableSystemConfidentiality\": \"NOT_DEFINED\", \"modifiedVulnerableSystemIntegrity\": \"NOT_DEFINED\", \"modifiedVulnerableSystemAvailability\": \"NOT_DEFINED\", \"modifiedSubsequentSystemConfidentiality\": \"NOT_DEFINED\", \"modifiedSubsequentSystemIntegrity\": \"NOT_DEFINED\", \"modifiedSubsequentSystemAvailability\": \"NOT_DEFINED\", \"safety\": \"NOT_DEFINED\", \"automatable\": \"NOT_DEFINED\", \"recovery\": \"NOT_DEFINED\", \"valueDensity\": \"NOT_DEFINED\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\"}}], \"cvssMetricV31\": [{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}]}",
      "published": "2024-12-06T16:15:20.623",
      "references": "[{\"url\": \"https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82\", \"source\": \"cna@python.org\"}, {\"url\": \"https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5\", \"source\": \"cna@python.org\"}, {\"url\": \"https://github.com/python/cpython/issues/127655\", \"source\": \"cna@python.org\"}, {\"url\": \"https://github.com/python/cpython/pull/127656\", \"source\": \"cna@python.org\"}, {\"url\": \"https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/\", \"source\": \"cna@python.org\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/12/06/1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "cna@python.org",
      "vulnStatus": "Awaiting Analysis",
      "weaknesses": "[{\"source\": \"cna@python.org\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-400\"}, {\"lang\": \"en\", \"value\": \"CWE-770\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-12254\",\"sourceIdentifier\":\"cna@python.org\",\"published\":\"2024-12-06T16:15:20.623\",\"lastModified\":\"2025-04-04T23:15:39.980\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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.\"},{\"lang\":\"es\",\"value\":\"Starting de Python 3.12.0, el m\u00e9todo asyncio._SelectorSocketTransport.writelines() no \\\"pausaba\\\" la escritura ni enviaba se\u00f1ales al protocolo para que vaciara el b\u00fafer hacia el cable una vez que el b\u00fafer de escritura alcanzaba el \\\"l\u00edmite superior\\\". Debido a esto, los protocolos no vaciaban peri\u00f3dicamente el b\u00fafer de escritura, lo que podr\u00eda provocar el agotamiento de la memoria. Es probable que esta vulnerabilidad afecte a una peque\u00f1a cantidad de usuarios. Debes usar Python 3.12.0 o posterior, en macOS o Linux, usar el m\u00f3dulo asyncio con protocolos y usar el m\u00e9todo .writelines(), que ten\u00eda un nuevo comportamiento de copia cero al escribir en Python 3.12.0 y posterior. Si no se cumplen todos estos factores, tu uso de Python no se ve afectado.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@python.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"cna@python.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"},{\"lang\":\"en\",\"value\":\"CWE-770\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"references\":[{\"url\":\"https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/issues/127655\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/pull/127656\",\"source\":\"cna@python.org\"},{\"url\":\"https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/\",\"source\":\"cna@python.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/12/06/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20250404-0010/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2024/12/06/1\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20250404-0010/\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-04-04T23:03:00.653Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-12254\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-06T15:35:11.234951Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:python_software_foundation:cpython:*:*:*:*:*:*:*:*\"], \"vendor\": \"python_software_foundation\", \"product\": \"cpython\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.12.0\", \"lessThan\": \"3.14.0a1\", \"versionType\": \"python\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-06T15:37:21.821Z\"}}], \"cna\": {\"title\": \"Unbounded memory buffering in SelectorSocketTransport.writelines()\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"J. Nick Koston\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Seth Larson\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 8.7, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/python/cpython\", \"vendor\": \"Python Software Foundation\", \"modules\": [\"asyncio\"], \"product\": \"CPython\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.12.0\", \"lessThan\": \"3.12.9\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.13.0\", \"lessThan\": \"3.13.2\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.14.0a1\", \"lessThan\": \"3.14.0a3\", \"versionType\": \"python\"}], \"platforms\": [\"MacOS\", \"Linux\"], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/python/cpython/issues/127655\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/python/cpython/pull/127656\", \"tags\": [\"patch\"]}, {\"url\": \"https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cdiv\u003eStarting 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.\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThis\\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.\u003c/div\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"shortName\": \"PSF\", \"dateUpdated\": \"2025-02-04T20:38:34.082Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-12254\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-04T23:03:00.653Z\", \"dateReserved\": \"2024-12-05T16:17:55.154Z\", \"assignerOrgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"datePublished\": \"2024-12-06T15:19:41.576Z\", \"assignerShortName\": \"PSF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.