GHSA-prqf-xr2j-xf65 Potential privilege escalation on Kubernetes >= v1.19 when the Argo Sever is run with `--auth-mode=client`
Attackers can escalate privileges to the server account when Argo Server uses client auth mode on non-Kubernetes deployments.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-prqf-xr2j-xf65?
GHSA-prqf-xr2j-xf65 is a vulnerability in github.com/argoproj/argo-workflows, published on 23 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Impact
This is pro-active fix. No know exploits exist.
Impacted:
- You're running Kubernetes >= v1.19
- You're running Argo Server
- It is configured to with
--auth-mode=client - Is not configured with
--auth-mode=server - You are not running Argo Server in Kubernetes pod. E.g. on bare metal or other VM.
- You're using client key to authenticate on the server.
- The server has more permissions that the connecting client's account.
The client's authentication will be ignored and the server's authentication will be used. This will result in privilege escalation to that of the the server's account.
Patches
https://github.com/argoproj/argo-workflows/pull/6506
Workarounds
None.
Which versions are affected by GHSA-prqf-xr2j-xf65?
7 open source packages ship an affected version, including github.com/argoproj/argo-workflows/v3, github.com/argoproj/argo-workflows and github.com/argoproj/argo-workflows/v2.
| Package | Affected | Fixed in |
|---|---|---|
github.com/argoproj/argo-workflows/v3 Go | From 3.0.0 | 3.0.9, 3.1.6 |
github.com/argoproj/argo-workflows/v3 Go | From 3.0.0 | 3.0.9 |
github.com/argoproj/argo-workflows/v3 Go | From 3.0.0 | 3.0.9 |
github.com/argoproj/argo-workflows/v3 Go | From 3.1.0 | 3.1.6 |
github.com/argoproj/argo-workflows/v3 Go | From 3.1.0 | 3.1.6 |
github.com/argoproj/argo-workflows Go | All versions | None |
1 more packages
github.com/argoproj/argo-workflows/v2 Go | All versions | None |
How do I fix GHSA-prqf-xr2j-xf65?
Upgrade github.com/argoproj/argo-workflows/v3 to a fixed version for your release line: 3.0.9 or 3.1.6.
Is GHSA-prqf-xr2j-xf65 being exploited?
There is no known exploitation of GHSA-prqf-xr2j-xf65 in the wild and no public exploit code.
Sources
Also known as GO-2022-0405.