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authorKim Alvefur <zash@zash.se>2019-07-20 04:19:58 +0200
committerKim Alvefur <zash@zash.se>2019-07-20 04:19:58 +0200
commit3204f55be1cbe4c9871584d0ee957f72afed8055 (patch)
treed3e14031365c5059107e696d558e1750ca1e1cb5 /plugins
parente081fd664251a2eb7ab68262c2b8a3cad4b381c7 (diff)
downloadprosody-3204f55be1cbe4c9871584d0ee957f72afed8055.tar.gz
prosody-3204f55be1cbe4c9871584d0ee957f72afed8055.zip
mod_websocket: Clone stanza before mutating (fixes #1398)
Checking for `stanza.attr.xmlns == nil` to determine if the stanza object is an actual stanza (`<message>`, `<presence>` or `<iq>` in the `jabber:client` or `jabbber:server` namespace) or some other stream element. Since this mutation is not reverted, it may leak to other places and cause them to mistreat stanzas as stream elements. Especially in cases like MUC where a single stanza is broadcast to many recipients.
Diffstat (limited to 'plugins')
-rw-r--r--plugins/mod_websocket.lua1
1 files changed, 1 insertions, 0 deletions
diff --git a/plugins/mod_websocket.lua b/plugins/mod_websocket.lua
index b4aba338..686a8981 100644
--- a/plugins/mod_websocket.lua
+++ b/plugins/mod_websocket.lua
@@ -285,6 +285,7 @@ function handle_request(event)
end);
add_filter(session, "stanzas/out", function(stanza)
+ stanza = st.clone(stanza);
local attr = stanza.attr;
attr.xmlns = attr.xmlns or xmlns_client;
if stanza.name:find("^stream:") then