Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS01NjUzLTQzN2YtNWhtY806oQ

Denial of service

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.

Permalink: https://github.com/advisories/GHSA-5653-437f-5hmc
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS01NjUzLTQzN2YtNWhtY806oQ
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: over 1 year ago

CVSS Score: 6.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Identifiers: GHSA-5653-437f-5hmc, CVE-2019-16764
References:

• https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986
• https://nvd.nist.gov/vuln/detail/CVE-2019-16764
• https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf
• https://hex.pm/packages/pow_assent
• http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1
• https://github.com/advisories/GHSA-5653-437f-5hmc

Repository: https://github.com/pow-auth/pow_assent
Blast Radius: 9.7

Affected Packages