From: Mark Andrews <marka@isc.org>
Date: Fri, 3 Jun 2022 06:55:56 +0000 (+1000)
Subject: Clone the message buffer before forwarding UPDATE messages
X-Git-Tag: v9.19.4~43^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a42417d61b4273a5819899232e4342b2ae79f03;p=thirdparty%2Fbind9.git

Clone the message buffer before forwarding UPDATE messages

this prevents named forwarding a buffer that may have been over
written.
---

diff --git a/lib/ns/update.c b/lib/ns/update.c
index 0e5abf0d6da..28b59a54844 100644
--- a/lib/ns/update.c
+++ b/lib/ns/update.c
@@ -1765,6 +1765,7 @@ ns_update_start(ns_client_t *client, isc_nmhandle_t *handle,
 		CHECK(checkupdateacl(client, dns_zone_getforwardacl(zone),
 				     "update forwarding", zonename, true,
 				     false));
+		dns_message_clonebuffer(client->message);
 		CHECK(send_forward_event(client, zone));
 		break;
 	default: