Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS03cDhmLThoam0td205Ms0h7w

Lookup operations do not take into account wildcards in SpiceDB

Impact

Any user making use of a wildcard relationship under the right hand branch of an exclusion or within an intersection operation will see Lookup/LookupResources return a resource as "accessible" if it is not accessible by virtue of the inclusion of the wildcard in the intersection or the right side of the exclusion.

For example, given schema:

definition user {}

definition resource {
   relation viewer: user
   relation banned: user | user:*
   permission view = viewer - banned
}

If user:* is placed into the banned relation for a particular resource, view should return false for all resources. in v1.3.0, the wildcard is ignored entirely in lookup's dispatch, resulting in the banned wildcard being ignored in the exclusion.

Workarounds

Don't make use of wildcards on the right side of intersections or within exclusions.

References

https://github.com/authzed/spicedb/issues/358

For more information

If you have any questions or comments about this advisory:

• Open an issue in SpiceDB
• Ask a question in the SpiceDB Discord

Permalink: https://github.com/advisories/GHSA-7p8f-8hjm-wm92
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS03cDhmLThoam0td205Ms0h7w
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: about 1 year ago

CVSS Score: 8.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Identifiers: GHSA-7p8f-8hjm-wm92, CVE-2022-21646
References:

• https://github.com/authzed/spicedb/security/advisories/GHSA-7p8f-8hjm-wm92
• https://nvd.nist.gov/vuln/detail/CVE-2022-21646
• https://github.com/authzed/spicedb/issues/358
• https://github.com/authzed/spicedb/commit/15bba2e2d2a4bda336a37a7fe8ef8a35028cd970
• https://github.com/authzed/spicedb/releases/tag/v1.4.0
• https://github.com/advisories/GHSA-7p8f-8hjm-wm92

Repository: https://github.com/authzed/spicedb
Blast Radius: 10.0

Affected Packages