Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1tajM1LTJyZ2YtY3Y4cM4AA6l2

OpenID Connect client Atom Exhaustion in provider configuration worker ets table location

Impact

DOS by Atom exhaustion is possible by calling oidcc_provider_configuration_worker:get_provider_configuration/1 or oidcc_provider_configuration_worker:get_jwks/1.

Since the name is usually provided as a static value in the application using oidcc, this is unlikely to be exploited.

Details

Example to illustrate the vulnerability.

{ok, Claims} =
  oidcc:retrieve_userinfo(
    Token,
    myapp_oidcc_config_provider,
    <<"client_id">>,
    <<"client_secret">>,
    #{}
  )

The vulnerability is present in oidcc_provider_configuration_worker:get_ets_table_name/1.
The function get_ets_table_name is calling erlang:list_to_atom/1.

https://github.com/erlef/oidcc/blob/018dbb53dd752cb1e331637d8e0e6a489ba1fae9/src/oidcc_provider_configuration_worker.erl#L385-L388

There might be a case (Very highly improbable) where the 2nd argument of
oidcc_provider_configuration_worker:get_*/1 is called with a different atom each time which eventually leads to
the atom table filling up and the node crashing.

Patches

Patched in 3.0.2, 3.1.2 & 3.2.0-beta.3

Workarounds

Make sure only valid provider configuration worker names are passed to the functions.

References

• https://erlef.github.io/security-wg/secure_coding_and_deployment_hardening/atom_exhaustion.html

Permalink: https://github.com/advisories/GHSA-mj35-2rgf-cv8p
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1tajM1LTJyZ2YtY3Y4cM4AA6l2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 30 days ago
Updated: 29 days ago

CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

Identifiers: GHSA-mj35-2rgf-cv8p, CVE-2024-31209
References:

• https://github.com/erlef/oidcc/security/advisories/GHSA-mj35-2rgf-cv8p
• https://github.com/erlef/oidcc/commit/2f304d877c7e0613d6fd952d7feacbf40dbc355c
• https://github.com/erlef/oidcc/commit/48171fb62688fb4eec1ead0884aa501e0aa68649
• https://github.com/erlef/oidcc/commit/ac458ed88dc292aad6fa7343f6a53e73c560fb1a
• https://erlef.github.io/security-wg/secure_coding_and_deployment_hardening/atom_exhaustion.html
• https://github.com/erlef/oidcc/blob/018dbb53dd752cb1e331637d8e0e6a489ba1fae9/src/oidcc_provider_configuration_worker.erl#L385-L388
• https://nvd.nist.gov/vuln/detail/CVE-2024-31209
• https://github.com/advisories/GHSA-mj35-2rgf-cv8p

Repository: https://github.com/erlef/oidcc
Blast Radius: 1.6

Affected Packages