### Impact
Automatically generated `NumberFilter` instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents.
### Patches
Version 2.4.0+ applies a `MaxValueValidator` with a a default `limit_value` of 1e50 to the form field used by `NumberFilter` instances.
In addition, `NumberFilter` implements the new `get_max_validator()` which should return a configured validator instance to customise the limit, or else `None` to disable the additional validation.
### Workarounds
Users may manually apply an equivalent validator if they are not able to upgrade.
### For more information
If you have any questions or comments about this advisory:
* Open an issue in [the django-filter repo](https://github.com/carltongibson/django-filter)
Thanks to Marcin Waraksa for the report.
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", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-10-27T02:09:48", "type": "fedora", "title": "[SECURITY] Fedora 34 Update: python-django-filter-21.1-1.fc34", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.0, "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-15225"], "modified": "2021-10-27T02:09:48", "id": "FEDORA:5BECC30AB84D", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/DPHENTRHRAYFXYPPBT7JRHZRWILRY44S/", "cvss": {"score": 4.0, "vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P"}}, {"lastseen": "2023-06-06T15:26:47", "description": "Django-filter is a reusable Django application for allowing users to filter querysets dynamically. 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Automatically generated `NumberFilter` instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents.\n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-04-30T21:27:44", "type": "redhatcve", "title": "CVE-2020-15225", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.0, "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-15225"], "modified": "2023-03-24T17:29:32", "id": "RH:CVE-2020-15225", "href": "https://access.redhat.com/security/cve/cve-2020-15225", "cvss": {"score": 4.0, "vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P"}}], "github": [{"lastseen": "2023-06-06T15:20:23", "description": "### Impact\n\nAutomatically generated `NumberFilter` instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents. \n\n### Patches\n\nVersion 2.4.0+ applies a `MaxValueValidator` with a a default `limit_value` of 1e50 to the form field used by `NumberFilter` instances. \n\nIn addition, `NumberFilter` implements the new `get_max_validator()` which should return a configured validator instance to customise the limit, or else `None` to disable the additional validation. \n\n### Workarounds\n\nUsers may manually apply an equivalent validator if they are not able to upgrade. \n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the django-filter repo](https://github.com/carltongibson/django-filter)\n\nThanks to Marcin Waraksa for the report. \n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-09-28T19:05:29", "type": "github", "title": "Potential DoS with NumberFilter conversion to integer values.", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.0, "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-15225"], "modified": "2023-02-01T05:04:49", "id": "GHSA-X7GM-RFGV-W973", "href": "https://github.com/advisories/GHSA-x7gm-rfgv-w973", "cvss": {"score": 4.0, "vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P"}}], "debiancve": [{"lastseen": "2023-06-06T14:54:20", "description": "django-filter is a generic system for filtering Django QuerySets based on user selections. In django-filter before version 2.4.0, automatically generated `NumberFilter` instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents. Version 2.4.0+ applies a `MaxValueValidator` with a a default `limit_value` of 1e50 to the form field used by `NumberFilter` instances. In addition, `NumberFilter` implements the new `get_max_validator()` which should return a configured validator instance to customise the limit, or else `None` to disable the additional validation. Users may manually apply an equivalent validator if they are not able to upgrade.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-04-29T21:15:00", "type": "debiancve", "title": "CVE-2020-15225", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.0, "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-15225"], "modified": "2021-04-29T21:15:00", "id": "DEBIANCVE:CVE-2020-15225", "href": "https://security-tracker.debian.org/tracker/CVE-2020-15225", "cvss": {"score": 4.0, "vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P"}}], "mageia": [{"lastseen": "2023-06-06T16:28:10", "description": "In django-filter before version 2.4.0, automatically generated 'NumberFilter' instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents. \n", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-11-18T21:50:59", "type": "mageia", "title": "Updated python-django-filter packages fix security vulnerability\n", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.0, "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-15225"], "modified": "2021-11-18T21:50:58", "id": "MGASA-2021-0511", "href": "https://advisories.mageia.org/MGASA-2021-0511.html", "cvss": {"score": 4.0, "vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P"}}], "ubuntucve": [{"lastseen": "2023-06-07T13:46:07", "description": "django-filter is a generic system for filtering Django QuerySets based on\nuser selections. In django-filter before version 2.4.0, automatically\ngenerated `NumberFilter` instances, whose value was later converted to an\ninteger, were subject to potential DoS from maliciously input using\nexponential format with sufficiently large exponents. Version 2.4.0+\napplies a `MaxValueValidator` with a a default `limit_value` of 1e50 to the\nform field used by `NumberFilter` instances. In addition, `NumberFilter`\nimplements the new `get_max_validator()` which should return a configured\nvalidator instance to customise the limit, or else `None` to disable the\nadditional validation. Users may manually apply an equivalent validator if\nthey are not able to upgrade.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2021-04-29T00:00:00", "type": "ubuntucve", "title": "CVE-2020-15225", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.0, "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "SINGLE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-15225"], "modified": "2021-04-29T00:00:00", "id": "UB:CVE-2020-15225", "href": "https://ubuntu.com/security/CVE-2020-15225", "cvss": {"score": 4.0, "vector": "AV:N/AC:L/Au:S/C:N/I:N/A:P"}}]}
Potential DoS with NumberFilter conversion to integer values.
