CVE-2019-16764

PowAssent is susceptible to denial of service attacks

CVSS 6.5 MEDIUMEPSS 1.1%CWE-400

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 6.5EPSS 1.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

25 nov 2019Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Produtos afetados

pow-auth · pow_assent

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Referências

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