CVE-2019-16764

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 v3.0 5.5 MEDIUM
CVSS v2.0 2.1 LOW

5.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

2.1^/10

CVSS v2.0 : LOW

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

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

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Configurations

Configuration 1 (hide)

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

Information

Published : 2019-11-25 09:15

Updated : 2021-10-28 06:21

NVD link : CVE-2019-16764

Mitre link : CVE-2019-16764

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

powauth

powassent

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