National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-16764 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 5.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score
CNA:  security-advisories@github.com
Base Score: 6.5 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://erlang.org/doc/efficiency_guide/commoncaveats.html#list_to_atom-1 Product
https://github.com/pow-auth/pow_assent/commit/026105eeecc0e3c2f807e7109e745ea93c0fd9cf Patch
https://github.com/pow-auth/pow_assent/security/advisories/GHSA-368c-xvrv-x986 Third Party Advisory
https://hex.pm/packages/pow_assent Release Notes

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation NIST  
CWE-400 Uncontrolled Resource Consumption security-advisories@github.com  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:powauth:powassent:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
0.4.4


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-16764
NVD Published Date:
11/25/2019
NVD Last Modified:
12/11/2019