| Gói / sản phẩm | Phiên bản bị ảnh hưởng | Phiên bản đã vá |
|---|---|---|
| github.com/nezhahq/nezha | ≥ 1.4.0, < 1.14.15-0.20260517034128-05e5da253519 | 1.14.15-0.20260517034128-05e5da253519 |
Any authenticated non-admin member can connect to the server-status WebSocket and receive telemetry for all servers, including servers owned by other users. The normal server list API filters objects by HasPermission, but the WebSocket stream treats the presence of any authenticated user as authorization for the full unfiltered server list.
The server WebSocket route is registered under the optional-auth group in cmd/dashboard/controller/controller.go:71-73:
optionalAuth := api.Group("", optionalAuthMw)
optionalAuth.GET("/ws/server", commonHandler(serverStream))
serverStream treats any CtxKeyAuthorizedUser as a member, without checking admin role or per-server ownership, in cmd/dashboard/controller/ws.go:123-139:
u, isMember := c.Get(model.CtxKeyAuthorizedUser)
var userId uint64
if isMember {
userId = u.(*model.User).ID
}
...
stat, err := getServerStat(count == 0, isMember)
The authorization boolean is then used as a full/guest switch in getServerStat in cmd/dashboard/controller/ws.go:160-184:
if authorized {
serverList = singleton.ServerShared.GetSortedList()
} else {
serverList = singleton.ServerShared.GetSortedListForGuest()
}
...
servers = append(servers, model.StreamServer{
ID: server.ID,
Name: server.Name,
PublicNote: utils.IfOr(withPublicNote, server.PublicNote, ""),
DisplayIndex: server.DisplayIndex,
Host: utils.IfOr(authorized, server.Host, server.Host.Filter()),
State: server.State,
CountryCode: countryCode,
LastActive: server.LastActive,
})
For authenticated members, GetSortedList() returns all servers and server.Host is not filtered. There is no call to server.HasPermission(c).
The streamed response model in model/server_api.go:5-20 includes server ID/name, public note, host details, runtime state, country code, last active time, and global online count. Host and state fields include platform version, agent version, CPU/GPU names, memory/disk/swap totals, architecture, virtualization, boot time, CPU load, memory/disk/swap usage, network transfer/speed, uptime, TCP/UDP/process counts, temperatures, and GPU utilization, as defined in model/host.go:20-38 and model/host.go:100-112.
The normal list endpoint has the expected object-level authorization. GET /api/v1/server is registered with listHandler in , and filters each returned object with in :
Bạn đang dùng một trong các sản phẩm này? Quét site để biết có đang lộ phiên bản có lỗ hổng không.
Quét site miễn phícmd/dashboard/controller/controller.go:113listHandlerHasPermissioncmd/dashboard/controller/controller.go:263-291filtered := filter(c, data)
...
return slices.DeleteFunc(s, func(e E) bool {
return !e.HasPermission(ctx)
})
The shared permission model in model/common.go:44-56 allows admins to see all objects but restricts members to objects whose UserID matches their user ID:
if user.Role == RoleAdmin {
return true
}
return user.ID == c.UserID
Mitigations checked:
GetSortedListForGuest() and Host.Filter() output, but authenticated members bypass both guest restrictions.HideForGuest only affects unauthenticated guests, not members./api/v1/server list endpoint uses listHandler and is not affected in the same way.Candidate score: 12/14
Exploitability gate: statically confirmed
GET /api/v1/ws/server85b0dd2992733037b019442caffc6c049ba937dd (v2.0.7-1-g85b0dd2)Static local PoC steps:
GET /api/v1/ws/server HTTP/1.1
Host: 127.0.0.1:8008
Cookie: nz-jwt=<user-a-token>
Upgrade: websocket
Connection: Upgrade
singleton.ServerShared.GetSortedList(), including servers whose UserID does not match user A.GET /api/v1/server using the same token; that route is filtered through listHandler/HasPermission and should only return user A's own servers.Cleanup: no persistent state is created by the WebSocket connection.
Local dynamic confirmation note: the full project test/runtime could not be executed in this audit environment because the repository requires Go 1.26 and the local toolchain reported go: download go1.26 for linux/amd64: toolchain not available.
This is an authenticated horizontal information disclosure. A low-privileged member can continuously monitor other users' server inventory and live telemetry, including host platform details, agent versions, CPU/GPU details, resource usage, traffic counters, country code, and last-active timestamps. This may expose infrastructure composition, usage patterns, and operational state across tenants.
Apply object-level authorization in getServerStat for authenticated non-admin users. For each server in the stream, include it only if the current user is admin or server.UserID matches the authenticated user. Keep guest filtering and host redaction for unauthenticated users.