[pdm-devel] [PATCH datacenter-manager 2/3] fix #6901: api: add explicit permission check for vnets list

[Stefan Hanreich]

On 10/14/25 5:03 PM, Shan Shaji wrote:
> When a non-root user tried to access the EVPN section, the API was
> throwing "403: permission check failed" error. To fix this, add
> explicit permission check for the `/vnets` endpoint.
> 
> Now every authenticated user can access the endpoint however, the user
> needs to have at least `Resource.Audit` permission under `/resource`.
> Only the vnets from remotes which the user has `Resource.Audit`
> privilege on `/remote/{remote_name}` will be included in the returned
> list.
> 
> Signed-off-by: Shan Shaji <s.shaji at proxmox.com>
> ---
>  server/src/api/sdn/vnets.rs | 29 ++++++++++++++++++++++++++---
>  1 file changed, 26 insertions(+), 3 deletions(-)
> 
> diff --git a/server/src/api/sdn/vnets.rs b/server/src/api/sdn/vnets.rs
> index a8092cf..a2dfdb4 100644
> --- a/server/src/api/sdn/vnets.rs
> +++ b/server/src/api/sdn/vnets.rs
> @@ -1,3 +1,4 @@
> +use core::option::Option::Some;

unneeded import?

>  use std::collections::HashSet;
>  
>  use anyhow::{format_err, Error};
> @@ -5,10 +6,11 @@ use pbs_api_types::REMOTE_ID_SCHEMA;
>  use pdm_api_types::{
>      remotes::RemoteType,
>      sdn::{CreateVnetRemote, ListVnet, SDN_ID_SCHEMA, VXLAN_ID_SCHEMA},
> -    Authid,
> +    Authid, PRIV_RESOURCE_AUDIT,
>  };
> +use proxmox_access_control::CachedUserInfo;
>  use proxmox_rest_server::WorkerTask;
> -use proxmox_router::{Router, RpcEnvironment};
> +use proxmox_router::{http_bail, Permission, Router, RpcEnvironment};
>  use proxmox_schema::api;
>  use pve_api_types::{CreateVnet, SdnVnetType};
>  
> @@ -52,16 +54,37 @@ pub const ROUTER: Router = Router::new()
>              type: ListVnet,
>          },
>      },
> +    access: {
> +        permission: &Permission::Anybody,
> +        description: "The user needs to have at least the `Resource.Audit` privilege under `/resource`.
> +        Only vnets from remotes for which the user has `Resource.Audit` on `/remote/{remote_name}`
> +        will be included in the returned list."
> +    }
>  )]
>  /// Query VNets of PVE remotes with optional filtering options
>  async fn list_vnets(
>      pending: Option<bool>,
>      running: Option<bool>,
>      remotes: Option<HashSet<String>>,
> +    rpcenv: &mut dyn RpcEnvironment,
>  ) -> Result<Vec<ListVnet>, Error> {
> +    let user_info = CachedUserInfo::new()?;
> +
> +    let auth_id: Authid = rpcenv
> +        .get_auth_id()
> +        .ok_or_else(|| format_err!("no authid available"))?
> +        .parse()?;
> +
> +    if !user_info.any_privs_below(&auth_id, &["resource"], PRIV_RESOURCE_AUDIT)? {
> +        http_bail!(FORBIDDEN, "user has no access to resources");

we use UNAUTHORIZED instead of FORBIDDEN in other places, so imo would
be better to do that here too - same for the other 2 patches as well.

> +    }
> +
>      let (remote_config, _) = pdm_config::remotes::config()?;
> +    let authorized_remotes = remote_config.into_iter().filter(|(remote_name, _)| {
> +        user_info.lookup_privs(&auth_id, &["resource", &remote_name]) & PRIV_RESOURCE_AUDIT != 0
> +    });
>  
> -    let filtered_remotes = remote_config.into_iter().filter_map(|(_, remote)| {
> +    let filtered_remotes = authorized_remotes.filter_map(|(_, remote)| {
>          if remote.ty == RemoteType::Pve
>              && remotes
>                  .as_ref()