[SOLVED] What privilege for "Download from URL" (ISO storage)

[woodstock]

Hi everybody,

I have setup a user (PVE realm) in my cluster hat has all Datastore.* privileges.

This user can upload ISO images but cannot use Download from URL. The button is disabled.

What privilege does this user need to use this function?

Regards and Thanks.

 

[nunner]

Hi,

you need Datastore.AllocateTemplate, Sys.Audit and Sys.Modify for the button to be enabled. See also here [1] and here [2] (under the "required permissions" section) .

[1] https://git.proxmox.com/?p=pve-mana...68a617fe82025e14ccb3e97a2ad17fe6e;hb=HEAD#l54
[2] https://pve.proxmox.com/pve-docs/api-viewer/index.html#/nodes/{node}/storage/{storage}/download-url

 

[woodstock]

Thanks for your fast reply and for pointing to the definition.

Unfortunately Sys.Modify is a way too high privilege for our user.

To be honest, I don't understand the connection between uploading ISO files and Sys.Modify (create/modify/remove node network parameters [1]) and Sys.Audit (view node status/config, Corosync cluster config, and HA config [1]).
I really look forward to the roadmaps point Project "Cattle and Pets" hoping it lets me define the privileges better.

[1] https://pve.proxmox.com/wiki/User_Management

 

[nunner]

To be honest, I don't understand the connection between uploading ISO files and Sys.Modify

When you download a file, the URL gets resolved on the PVE host itself. If your server is sitting in a locked-down/separate network, this might allow a user to probe for different hosts that they shouldn't even be allowed to access. You can also check the original commit message (with this exact reasoning) here [1]. We've thought about whether this might be too harsh of a restriction, and you're welcome to open a report on our bugzilla instance [2], where others can chime in too.

[1] https://git.proxmox.com/?p=pve-manager.git;a=commit;h=591e8a8ffbae0d9653450f6eadd5240db3c75019
[2] https://bugzilla.proxmox.com/

 

[woodstock]

this might allow a user to probe for different hosts that they shouldn't even be allowed to access

Good point. Makes sense now.

 

[drewhemm]

I believe this change should allow downloading from URL without granting Sys.Modify:

https://lists.proxmox.com/pipermail/pve-devel/2024-February/061842.html

However, I haven't been able to get it to work. Are there instructions somewhere on exactly what permissions need to be granted upon what resources for this to work?