CVE-2019-16764 - OpenCVE

The use of `String.to_atom/1` in PowAssent is susceptible to denial of service attacks. In `PowAssent.Phoenix.AuthorizationController` a value is fetched from the user provided params, and `String.to_atom/1` is used to convert the binary value to an atom so it can be used to fetch the provider configuration value. This is unsafe as it is user provided data, and can be used to fill up the whole atom table of ~1M which will cause the app to crash.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

AV:L/AC:L/Au:N/C:N/I:N/A:P

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Powauth	Powassent

Configuration 1 [-]

cpe:2.3:a:powauth:powassent:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1
https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf
https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986
https://hex.pm/packages/pow_assent

History

No history.

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2019-11-25T17:11:19

Updated: 2024-08-05T01:24:47.215Z

Reserved: 2019-09-24T00:00:00

Link: CVE-2019-16764

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2019-11-25T17:15:11.713

Modified: 2021-10-28T13:21:40.897

Link: CVE-2019-16764

Redhat

No data.

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:powauth:powassent:*:*:*:*:*:*:*:*", "matchCriteriaId": "A7675EB0-7582-4883-A50F-889C5DC77B95", "versionEndExcluding": "0.4.4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The use of `String.to_atom/1` in PowAssent is susceptible to denial of service attacks. In `PowAssent.Phoenix.AuthorizationController` a value is fetched from the user provided params, and `String.to_atom/1` is used to convert the binary value to an atom so it can be used to fetch the provider configuration value. This is unsafe as it is user provided data, and can be used to fill up the whole atom table of ~1M which will cause the app to crash."}, {"lang": "es", "value": "El uso de \"String.to_atom/1\" en PowAssent es susceptible a ataques de denegaci\u00f3n de servicio. En \"PowAssent.Phoenix.AuthorizationController\" se obtiene un valor de los par\u00e1metros proporcionados por parte el usuario, y \"String.to_atom/1\" es usado para convertir el valor binario en un \u00e1tomo para que pueda usarse para obtener el valor de configuraci\u00f3n del proveedor. Esto no es seguro, ya que son datos suministrados por parte el usuario, y se pueden ser usados para llenar toda la tabla de \u00e1tomos de ~1M, lo que causar\u00e1 que la aplicaci\u00f3n se bloque\u00e9"}], "id": "CVE-2019-16764", "lastModified": "2021-10-28T13:21:40.897", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2019-11-25T17:15:11.713", "references": [{"source": "security-advisories@github.com", "tags": ["Product"], "url": "http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://hex.pm/packages/pow_assent"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "security-advisories@github.com", "type": "Secondary"}]}