Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-5pmx-7r6r-wfqq
No affected components available
Summary
The transformation policy template feature in Kgateway versions through 2.0.4 allows users with TrafficPolicy creation permissions to craft transformations that read and expose arbitrary files from the dataplane container filesystem.
Description
Impact
Users with permissions to create a TrafficPolicy can create a transformation that returns files from within the dataplane container. While no secrets are mounted to the container by default, users who mount custom volumes to the dataplane should be aware of potential data exposure through this vulnerability.
This could allow unauthorized access to:
- Configuration files within the container
- Custom mounted volumes and their contents
- Any files accessible to the dataplane container process
Note: Updated availability score to high, as under some configurations this can prevent xDS updates.
Patches
Upgrade to version 2.0.5 or 2.1.0. These versions include an updated transformation filter in envoy-gloo that prevents file access through transformation templates.
Workarounds
If you are not using transformations, you can disallow TrafficPolicy creation or restrict transformation usage using a ValidatingAdmissionPolicy to prevent exploitation while preparing to upgrade.
References
- Fix in 2.1.0: https://github.com/kgateway-dev/kgateway/pull/12528 (envoy-gloo v1.35.2-patch4)
- Backport to 2.0.5: Included in https://github.com/kgateway-dev/kgateway/pull/12535 (envoy-gloo v1.34.6-patch3)
- Envoy-gloo releases: https://github.com/solo-io/envoy-gloo/releases/tag/v1.35.2-patch4
- Envoy-gloo releases: https://github.com/solo-io/envoy-gloo/releases/tag/v1.34.6-patch3
Credits
Kindly reported by @rikatz
For More Information
If you have any questions or comments about this advisory, please reach out in slack https://cloud-native.slack.com/archives/C080D3PJMS4
The vulnerability can be exploited over a local network, such as Wi-Fi. 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 low impact on the confidentiality of the information. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard