Benoit Tellier created JAMES-3691:
-------------------------------------
Summary: JMAP Push: Prevent server-side request forgery
Key: JAMES-3691
URL: https://issues.apache.org/jira/browse/JAMES-3691
Project: James Server
Issue Type: Improvement
Reporter: Benoit Tellier
https://jmap.io/spec-core.html#connection-to-unknown-push-server
```
The server MUST ensure the URL is externally resolvable to avoid server-side
request forgery, where the server makes a request to a resource on its internal
network.
```
We do not do that.
We should resolve the hostname of the URL and reject it if it belong to one of
these network:
```
Private network class A: 10.0.0.0 — 10.255.255.255
Private network class B: 172.16.0.0 — 172.31.255.255
Private network class C: 192.168.0.0 — 192.168.255.255
127.0. 0.0 to 127.255. 255.255
```
This should be done at Push subscription creation, as well as when submitting
push notifications.
**DOD**: integretion tests rejecting server-side request forgery attemps
against webadmin.
Remark: not a CVE vulnerability as it is not part of any released artifact.
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