CVE-2023-2253
distribution catalog API endpoint can lead to OOM via malicious user input
Impact
### Impact Systems that run `distribution` built after a specific commit running on memory-restricted environments can suffer from denial of service by a crafted malicious `/v2/_catalog` API endpoint request. ### Patches Upgrade to at least 2.8.2-beta.1 if you are running `v2.8.x` release. If you use the code from the main branch, update at least to the commit after [f55a6552b006a381d9167e328808565dd2bf77dc](https://github.com/distribution/distribution/commit/f55a6552b006a381d9167e328808565dd2bf77dc). ### Workarounds There is no way to work around this issue without patching. Restrict access to the affected API endpoint: see the recommendations section. ### References `/v2/_catalog` endpoint accepts a parameter to control the maximum amount of records returned (query string: `n`). When not given the default `n=100` is used. The server trusts that `n` has an acceptable value, however when using a maliciously large value, it allocates an array/slice of `n` of strings before filling the slice with data. This behaviour was introduced ~7yrs ago [1]. ### Recommendation The `/v2/_catalog` endpoint was designed specifically to do registry syncs with search or other API systems. Such an endpoint would create a lot of load on the backend system, due to overfetch required to serve a request in certain implementations. Because of this, we strongly recommend keeping this API endpoint behind heightened privilege and avoiding leaving it exposed to the internet. ### For more information If you have any questions or comments about this advisory: * Open an issue in [distribution repository](https://github.com/distribution/distribution) * Email us at [cncf-distribution-security@lists.cncf.io](mailto:cncf-distribution-security@lists.cncf.io) [1] [faulty commit](https://github.com/distribution/distribution/blob/b7e26bac741c76cb792f8e14c41a2163b5dae8df/registry/handlers/catalog.go#L45)
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/docker/distribution | < 2.8.2-beta.1 | 2.8.2-beta.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Openshift Api For Data Protection | All versions |
| Redhat | Openshift Container Platform | Version 4.0 |
| Redhat | Openshift Developer Tools And Services | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2189886
- https://lists.debian.org/debian-lts-announce/2023/06/msg00035.html
- https://github.com/advisories/GHSA-hqxw-f8mx-cpmw
- https://github.com/distribution/distribution/security/advisories/GHSA-hqxw-f8mx-cpmw
- https://github.com/distribution/distribution/commit/f55a6552b006a381d9167e328808565dd2bf77dc
- https://nvd.nist.gov/vuln/detail/CVE-2023-2253