The server automatically accepts any fds the client sends (stdin and
(recently) cwd). However, when a client indicates a different
protocol version the server does not bother to keep track of the
fds, but also does not close them.
Immediately close any fds passed by clients advertising an
incompatible protocol version.
---
server-client.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/server-client.c b/server-client.c
index aceef6e..cc18a96 100644
--- a/server-client.c
+++ b/server-client.c
@@ -808,6 +808,8 @@ server_client_msg_dispatch(struct client *c)
if (imsg.hdr.peerid != PROTOCOL_VERSION) {
server_write_client(c, MSG_VERSION, NULL, 0);
c->flags |= CLIENT_BAD;
+ if (imsg.fd != -1)
+ close(imsg.fd);
imsg_free(&imsg);
continue;
}
--
1.8.4
------------------------------------------------------------------------------
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