fkie_cve-2024-12254
Vulnerability from fkie_nvd
Published
2024-12-06 16:15
Modified
2025-02-03 18:15
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
References
cna@python.orghttps://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82
cna@python.orghttps://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5
cna@python.orghttps://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786
cna@python.orghttps://github.com/python/cpython/issues/127655
cna@python.orghttps://github.com/python/cpython/pull/127656
cna@python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/12/06/1
Impacted products
Vendor Product Version


To clipboard 

{
   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 método asyncio._SelectorSocketTransport.writelines() no \"pausaba\" la escritura ni enviaba señales al protocolo para que vaciara el búfer hacia el cable una vez que el búfer de escritura alcanzaba el \"límite superior\". Debido a esto, los protocolos no vaciaban periódicamente el búfer de escritura, lo que podría provocar el agotamiento de la memoria. Es probable que esta vulnerabilidad afecte a una pequeña cantidad de usuarios. Debes usar Python 3.12.0 o posterior, en macOS o Linux, usar el módulo asyncio con protocolos y usar el método .writelines(), que tenía 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: "2025-02-03T18:15:33.110",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               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",
            },
            exploitabilityScore: 3.9,
            impactScore: 3.6,
            source: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            type: "Secondary",
         },
      ],
      cvssMetricV40: [
         {
            cvssData: {
               Automatable: "NOT_DEFINED",
               Recovery: "NOT_DEFINED",
               Safety: "NOT_DEFINED",
               attackComplexity: "LOW",
               attackRequirements: "NONE",
               attackVector: "NETWORK",
               availabilityRequirement: "NOT_DEFINED",
               baseScore: 8.7,
               baseSeverity: "HIGH",
               confidentialityRequirement: "NOT_DEFINED",
               exploitMaturity: "NOT_DEFINED",
               integrityRequirement: "NOT_DEFINED",
               modifiedAttackComplexity: "NOT_DEFINED",
               modifiedAttackRequirements: "NOT_DEFINED",
               modifiedAttackVector: "NOT_DEFINED",
               modifiedPrivilegesRequired: "NOT_DEFINED",
               modifiedSubAvailabilityImpact: "NOT_DEFINED",
               modifiedSubConfidentialityImpact: "NOT_DEFINED",
               modifiedSubIntegrityImpact: "NOT_DEFINED",
               modifiedUserInteraction: "NOT_DEFINED",
               modifiedVulnAvailabilityImpact: "NOT_DEFINED",
               modifiedVulnConfidentialityImpact: "NOT_DEFINED",
               modifiedVulnIntegrityImpact: "NOT_DEFINED",
               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/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",
               version: "4.0",
               vulnAvailabilityImpact: "HIGH",
               vulnConfidentialityImpact: "NONE",
               vulnIntegrityImpact: "NONE",
               vulnerabilityResponseEffort: "NOT_DEFINED",
            },
            source: "cna@python.org",
            type: "Secondary",
         },
      ],
   },
   published: "2024-12-06T16:15:20.623",
   references: [
      {
         source: "cna@python.org",
         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: "af854a3a-2127-422b-91ae-364da2661108",
         url: "http://www.openwall.com/lists/oss-security/2024/12/06/1",
      },
   ],
   sourceIdentifier: "cna@python.org",
   vulnStatus: "Awaiting Analysis",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-400",
            },
            {
               lang: "en",
               value: "CWE-770",
            },
         ],
         source: "cna@python.org",
         type: "Secondary",
      },
      {
         description: [
            {
               lang: "en",
               value: "CWE-770",
            },
         ],
         source: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
         type: "Secondary",
      },
   ],
}


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