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GHSA-7p8f-8hjm-wm92
No affected components available
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
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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