CVE-2020-10735 (GCVE-0-2020-10735)

Vulnerability from cvelistv5 – Published: 2022-09-09 00:00 – Updated: 2025-11-03 21:44
VLAI
Summary
A flaw was found in python. In algorithms with quadratic time complexity using non-binary bases, when using int("text"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • DoS
Assigner
References
URL Tags
https://access.redhat.com/security/cve/CVE-2020-10735
https://github.com/python/cpython/issues/95778
https://docs.google.com/document/d/1KjuF_aXlzPUxT…
https://bugzilla.redhat.com/show_bug.cgi?id=1834423
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
http://www.openwall.com/lists/oss-security/2022/09/21/1 mailing-list
http://www.openwall.com/lists/oss-security/2022/09/21/4 mailing-list
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://lists.debian.org/debian-lts-announce/2023…
https://lists.debian.org/debian-lts-announce/2024…
https://lists.debian.org/debian-lts-announce/2024…
Impacted products
Vendor Product Version
n/a python Affected: python 3.7
Show details on NVD website
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"A flaw was found in python. In algorithms with quadratic time complexity using non-binary bases, when using int(\\\"text\\\"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.\"}, {\"lang\": \"es\", \"value\": \"Se ha encontrado un fallo en python. En los algoritmos con complejidad de tiempo cuadr\\u00e1tica que usan bases no binarias, cuando es usada int(\\\"text\\\"), un sistema podr\\u00eda tardar 50ms en analizar una cadena int con 100.000 d\\u00edgitos y 5s para 1.000.000 de d\\u00edgitos (float, decimal, int.from_bytes(), e int() para bases binarias 2, 4, 8, 16, y 32 no est\\u00e1n afectados). La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema\"}]",
      "id": "CVE-2020-10735",
      "lastModified": "2024-11-21T04:55:57.717",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"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": "2022-09-09T14:15:08.660",
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      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-704\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-10735\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2022-09-09T14:15:08.660\",\"lastModified\":\"2025-11-03T22:15:46.173\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A flaw was found in python. In algorithms with quadratic time complexity using non-binary bases, when using int(\\\"text\\\"), a system could take 50ms to parse an int string with 100,000 digits and 5s for 1,000,000 digits (float, decimal, int.from_bytes(), and int() for binary bases 2, 4, 8, 16, and 32 are not affected). The highest threat from this vulnerability is to system availability.\"},{\"lang\":\"es\",\"value\":\"Se ha encontrado un fallo en python. En los algoritmos con complejidad de tiempo cuadr\u00e1tica que usan bases no binarias, cuando es usada int(\\\"text\\\"), un sistema podr\u00eda tardar 50ms en analizar una cadena int con 100.000 d\u00edgitos y 5s para 1.000.000 de d\u00edgitos (float, decimal, int.from_bytes(), e int() para bases binarias 2, 4, 8, 16, y 32 no est\u00e1n afectados). La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"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\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-704\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.7.0\",\"versionEndExcluding\":\"3.7.14\",\"matchCriteriaId\":\"0743C1B3-D44D-4940-AAF4-25DEFB46AC74\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.8.0\",\"versionEndExcluding\":\"3.8.14\",\"matchCriteriaId\":\"5E28EB81-9BE6-4EC9-AC44-EFA4DDB0233F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.9.0\",\"versionEndExcluding\":\"3.9.14\",\"matchCriteriaId\":\"24517651-FDBB-4867-99A6-25E12EE8A117\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.10.0\",\"versionEndExcluding\":\"3.10.7\",\"matchCriteriaId\":\"6D795AAC-B427-4067-99F3-D36B0F936ACB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha1:*:*:*:*:*:*\",\"matchCriteriaId\":\"514A577E-5E60-40BA-ABD0-A8C5EB28BD90\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha2:*:*:*:*:*:*\",\"matchCriteriaId\":\"83B71795-9C81-4E5F-967C-C11808F24B05\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3F6F71F3-299E-4A4B-ADD1-EAD5A1D433E2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha4:*:*:*:*:*:*\",\"matchCriteriaId\":\"D9BBF4E9-EA54-41B5-948E-8E3D2660B7EF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha5:*:*:*:*:*:*\",\"matchCriteriaId\":\"AEBFDCE7-81D4-4741-BB88-12C704515F5C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha6:*:*:*:*:*:*\",\"matchCriteriaId\":\"156EB4C2-EFB7-4CEB-804D-93DB62992A63\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:alpha7:*:*:*:*:*:*\",\"matchCriteriaId\":\"8CC972AE-16A8-4B74-A3E7-36BCDD7C1ED3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:beta1:*:*:*:*:*:*\",\"matchCriteriaId\":\"554015CB-0325-438B-8C11-0F85F54ABC50\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:beta2:*:*:*:*:*:*\",\"matchCriteriaId\":\"8037C129-0030-455E-A359-98E14D1498D4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:beta3:*:*:*:*:*:*\",\"matchCriteriaId\":\"7C3DC43B-72CC-4FC5-8072-F051FB47F6D1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:beta4:*:*:*:*:*:*\",\"matchCriteriaId\":\"6657ED60-908B-48E6-B95B-572E57CFBB69\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:beta5:*:*:*:*:*:*\",\"matchCriteriaId\":\"1EF628A1-82F5-403C-B527-388C13507CDF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:python:python:3.11.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"3055A198-13F8-42C0-8FD7-316AA8984A8A\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:redhat:quay:3.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1987BDA-0113-4603-B9BE-76647EB043F2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"749804DA-4B27-492A-9ABA-6BB562A6B3AC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"80E516C0-98A4-4ADE-B69F-66A772E2BAAA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E30D0E6F-4AE8-4284-8716-991DFA48CC5D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F4CFF558-3C47-480D-A2F0-BABF26042943\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2022/09/21/1\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third 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  }
}


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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.