VulnerabilityModified
CVE-2019-16764
The use of `String.to_atom/1` in PowAssent is susceptible to denial of service attacks.
MEDIUM 5.5EPSS 1.08%
Does this matter?
Lower severity and a low EPSS score (1.08%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.08% probability · 63th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- powauth/powassent
- Source
- security-advisories@github.com
References
- http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1Product
- https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cfPatch
- https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986Third Party Advisory
- https://hex.pm/packages/pow_assentRelease Notes
- http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1Product
- https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cfPatch
- https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986Third Party Advisory
- https://hex.pm/packages/pow_assentRelease Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.