[Snort-sigs] Kubernetes kubelet API

Phillip Lee phillile at sourcefire.com
Mon May 7 13:31:54 EDT 2018


Yaser,

Thanks for your submission. We will review the rules and get back to you when they're finished. 

Regards,
Phil Lee
Cisco Talos

> On May 7, 2018, at 1:03 PM, Y M via Snort-sigs <snort-sigs at lists.snort.org> wrote:
> 
> Hi,
> 
> The first rule addresses the unauthenticated read-only HTTP access potentially disclosing sensitive information about pods. The second rule address the remote execution attempts over the HTTPS read/write port. No pcaps available.
> 
> # --------------------
> # Date: 2018-05-06
> # Title: Analysis of a Kubernetes hack — Backdooring through kubelet
> # Reference: https://medium.com/handy-tech/analysis-of-a-kubernetes-hack-backdooring-through-kubelet-823be5c3d67c <https://medium.com/handy-tech/analysis-of-a-kubernetes-hack-backdooring-through-kubelet-823be5c3d67c>
> # Tests: syntax only
> 
> alert tcp $EXTERNAL_NET any -> $HOME_NET [10250,10255] (msg:"SERVER-OTHER Kubernetes kubelet API read-only pods information access attempt"; flow:to_server,established; content:"GET"; http_method; content:"/pods"; fast_pattern:only; http_uri; reference:url,medium.com/handy-tech/analysis-of-a-kubernetes-hack-backdooring-through-kubelet-823be5c3d67c <http://medium.com/handy-tech/analysis-of-a-kubernetes-hack-backdooring-through-kubelet-823be5c3d67c>; classtype:attempted-admin; sid:8000039; rev:1;)
> 
> alert tcp $EXTERNAL_NET any -> $HOME_NET [10250,10255] (msg:"SERVER-OTHER Kubernetes kubelet API pod remote execution attempt"; flow:to_server,established; content:"POST"; http_method; content:"/exec/"; fast_pattern:only; http_uri; content:"?command="; http_uri; reference:url,medium.com/handy-tech/analysis-of-a-kubernetes-hack-backdooring-through-kubelet-823be5c3d67c <http://medium.com/handy-tech/analysis-of-a-kubernetes-hack-backdooring-through-kubelet-823be5c3d67c>; classtype:attempted-admin; sid:8000040; rev:1;)
> 
> Thanks.
> YM
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