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Security Advisories: GSA_kwCzR0hTQS1nOXBoLWo1dmotZjh3bc4AA-18

Potential access to sensitive URLs via CKAN extensions (SSRF)

Impact

There are a number of CKAN plugins, including XLoader, DataPusher, Resource proxy and ckanext-archiver, that work by downloading the contents of local or remote files in order to perform some actions with their contents (e.g. pushing to the DataStore, streaming contents or saving a local copy). All of them use the resource URL, and there are currently no checks to limit what URLs can be requested. This means that a malicious (or unaware) user can create a resource with a URL pointing to a place where they should not have access in order for one of the previous tools to retrieve it (known as a Server Side Request Forgery).

Patches and Workarounds

Users wanting to protect against these kinds of attacks can use one or a combination of the following approaches:

Use a separate HTTP proxy like Squid that can be used to allow / disallow IPs, domains etc as needed, and make CKAN extensions aware of this setting via the ckan.download_proxy config option.
Implement custom firewall rules to prevent access to restricted resources.
Use custom validators on the resource url field to block/allow certain domains or IPs.

All latest versions of the plugins linked above support the ckan.download_proxy settings. Support for this setting in the Resource Proxy plugin was included in CKAN 2.10.5 and 2.11.0

References

Blog post provides more details on how to configure a Squid proxy to prevent these issues

Permalink: https://github.com/advisories/GHSA-g9ph-j5vj-f8wm
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1nOXBoLWo1dmotZjh3bc4AA-18
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 3 months ago
Updated: 3 months ago

CVSS Score: 4.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Identifiers: GHSA-g9ph-j5vj-f8wm, CVE-2024-43371
References:

Repository: https://github.com/ckan/ckan
Blast Radius: 6.2

Affected Packages

pypi:ckan

Dependent packages: 5
Dependent repositories: 24
Downloads: 5,258 last month
Affected Version Ranges: < 2.10.5
Fixed in: 2.10.5
All affected versions: 1.3.2, 1.3.3, 1.4.1, 1.4.2, 1.4.3, 1.5.1, 1.7.1, 2.0.1, 2.0.7, 2.0.8, 2.1.1, 2.1.5, 2.1.6, 2.2.1, 2.2.3, 2.2.4, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.8, 2.4.9, 2.5.0, 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.6, 2.5.7, 2.5.8, 2.5.9, 2.6.0, 2.6.1, 2.6.3, 2.6.4, 2.6.5, 2.6.6, 2.6.7, 2.6.8, 2.6.9, 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5, 2.7.6, 2.7.7, 2.7.8, 2.7.9, 2.7.10, 2.7.11, 2.7.12, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.8.5, 2.8.6, 2.8.7, 2.8.8, 2.8.9, 2.8.10, 2.8.11, 2.8.12, 2.9.0, 2.9.1, 2.9.2, 2.9.3, 2.9.4, 2.9.5, 2.9.6, 2.9.7, 2.9.8, 2.9.9, 2.9.10, 2.9.11, 2.10.0, 2.10.1, 2.10.3, 2.10.4
All unaffected versions: 2.10.5, 2.11.0