Ecosyste.ms: Advisories

An open API service providing security vulnerability metadata for many open source software ecosystems.

Security Advisories: GSA_kwCzR0hTQS1oZjU5LTdyd3EtNzg1bc4ABAmD

In AshPostgres, empty, atomic, non-bulk actions, policy bypass for side-effects vulnerability.

Impact

What kind of vulnerability is it? Who is impacted?

In certain very specific situations, it was possible for the policies of an update action to be skipped. This occurred only on "empty" update actions (no changing fields), and would allow their hooks (side effects) to be performed when they should not have been. Note that this does not allow reading new data that the user should not have had access to, only triggering a side effect a user should not have been able to trigger.

You must have an update action that:


Everything above the line can be checked with the provided script. Everything below it, must be checked manually. The script for checking this is available in the "Might I be affected" section.

The script can have false positives, but will not have any false negatives. So if you run the script, and it says "No potential vulnerabilities found", then all you need to do is update ash_postgres.

Patches

This problem has been patched in 2.4.10 of ash_postgres.

Workarounds

You could:

  1. Determine that none of your actions are vulnerable using the script.
  2. Add require_atomic? false to any potentially affected update action
  3. Replace any usage of Ash.update with Ash.bulk_update for an affected action
  4. add an update timestamp to your action.

Might I be affected

This gist provides a script you can run to detect if you are potentially vulnerable.

https://gist.github.com/zachdaniel/e49166b765978c48dfaf998d06df436e

References

Original Report/discovery: https://elixirforum.com/t/empty-update-action-with-policies/66954
Fix commit: https://github.com/ash-project/ash_postgres/commit/1228fcd851f29a68609e236f7d6a2622a4b5c4ba

Permalink: https://github.com/advisories/GHSA-hf59-7rwq-785m
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1oZjU5LTdyd3EtNzg1bc4ABAmD
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 14 days ago
Updated: 14 days ago


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

Identifiers: GHSA-hf59-7rwq-785m, CVE-2024-49756
References: Repository: https://github.com/ash-project/ash_postgres
Blast Radius: 6.7

Affected Packages

hex:ash_postgres
Dependent packages: 4
Dependent repositories: 18
Downloads: 324,685 total
Affected Version Ranges: >= 2.0.0, < 2.4.10
Fixed in: 2.4.10
All affected versions: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10, 2.0.11, 2.0.12, 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.1.8, 2.1.9, 2.1.10, 2.1.11, 2.1.12, 2.1.13, 2.1.14, 2.1.15, 2.1.17, 2.1.18, 2.1.19, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.3.0, 2.3.1, 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.6, 2.4.7, 2.4.8, 2.4.9
All unaffected versions: 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.2.0, 0.2.1, 0.3.0, 0.4.0, 0.5.0, 0.6.0, 0.7.0, 0.8.0, 0.9.0, 0.10.0, 0.11.2, 0.12.0, 0.12.1, 0.13.0, 0.14.0, 0.15.0, 0.16.1, 0.17.0, 0.18.0, 0.19.0, 0.20.0, 0.20.1, 0.21.0, 0.22.0, 0.22.1, 0.23.0, 0.23.1, 0.23.2, 0.24.0, 0.25.0, 0.25.1, 0.25.2, 0.25.3, 0.25.4, 0.25.5, 0.26.0, 0.26.1, 0.26.2, 0.27.0, 0.28.0, 0.28.1, 0.29.1, 0.29.2, 0.29.3, 0.29.4, 0.29.5, 0.29.6, 0.30.1, 0.31.1, 0.32.0, 0.32.1, 0.32.2, 0.33.0, 0.33.1, 0.34.0, 0.34.1, 0.34.2, 0.34.3, 0.34.4, 0.34.5, 0.35.1, 0.35.3, 0.35.4, 0.35.5, 0.36.0, 0.36.1, 0.36.2, 0.36.3, 0.36.4, 0.36.5, 0.37.0, 0.37.1, 0.37.2, 0.37.3, 0.37.4, 0.37.5, 0.37.6, 0.37.7, 0.37.8, 0.38.0, 0.38.1, 0.38.2, 0.38.3, 0.38.4, 0.38.5, 0.38.6, 0.38.7, 0.38.8, 0.38.9, 0.38.10, 0.38.11, 0.40.1, 0.40.2, 0.40.3, 0.40.4, 0.40.5, 0.40.6, 0.40.7, 0.40.8, 0.40.9, 0.40.10, 0.40.11, 0.41.1, 0.41.2, 0.41.3, 0.41.4, 0.41.5, 0.41.6, 0.41.7, 0.43.0, 1.0.0, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.2.6, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.3.6, 1.3.8, 1.3.9, 1.3.10, 1.3.11, 1.3.12, 1.3.14, 1.3.15, 1.3.16, 1.3.17, 1.3.18, 1.3.19, 1.3.20, 1.3.21, 1.3.22, 1.3.23, 1.3.24, 1.3.25, 1.3.26, 1.3.28, 1.3.29, 1.3.30, 1.3.31, 1.3.32, 1.3.33, 1.3.34, 1.3.35, 1.3.36, 1.3.37, 1.3.38, 1.3.39, 1.3.40, 1.3.41, 1.3.42, 1.3.43, 1.3.44, 1.3.45, 1.3.46, 1.3.47, 1.3.48, 1.3.49, 1.3.50, 1.3.51, 1.3.52, 1.3.53, 1.3.54, 1.3.55, 1.3.56, 1.3.58, 1.3.59, 1.3.60, 1.3.61, 1.3.62, 1.3.63, 1.3.64, 1.3.65, 1.3.66, 1.3.67, 1.3.68, 1.4.0, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5, 1.5.6, 1.5.7, 1.5.8, 1.5.9, 1.5.10, 1.5.11, 1.5.12, 1.5.13, 1.5.14, 1.5.15, 1.5.16, 1.5.17, 1.5.18, 1.5.19, 1.5.20, 1.5.21, 1.5.22, 1.5.23, 1.5.24, 1.5.25, 1.5.26, 1.5.27, 1.5.28, 1.5.29, 1.5.30, 2.4.10, 2.4.11, 2.4.12