librabbitmq/SOURCES/rabbitmq-c-0.9.0-CVE-2019-1...

29 lines
1.3 KiB
Diff

diff -up rabbitmq-c-0.9.0/librabbitmq/amqp_connection.c.CVE-2019-18609 rabbitmq-c-0.9.0/librabbitmq/amqp_connection.c
--- rabbitmq-c-0.9.0/librabbitmq/amqp_connection.c.CVE-2019-18609 2020-04-06 15:10:07.002386201 +0200
+++ rabbitmq-c-0.9.0/librabbitmq/amqp_connection.c 2020-04-06 15:17:03.624425371 +0200
@@ -287,12 +287,21 @@ int amqp_handle_input(amqp_connection_st
case CONNECTION_STATE_HEADER: {
amqp_channel_t channel;
amqp_pool_t *channel_pool;
- /* frame length is 3 bytes in */
+ uint32_t frame_size;
+
channel = amqp_d16(amqp_offset(raw_frame, 1));
- state->target_size =
- amqp_d32(amqp_offset(raw_frame, 3)) + HEADER_SIZE + FOOTER_SIZE;
+ /* frame length is 3 bytes in */
+ frame_size = amqp_d32(amqp_offset(raw_frame, 3));
+ /* To prevent the target_size calculation below from overflowing, check
+ * that the stated frame_size is smaller than a signed 32-bit. Given
+ * the library only allows configuring frame_max as an int32_t, and
+ * frame_size is uint32_t, the math below is safe from overflow. */
+ if (frame_size >= INT32_MAX) {
+ return AMQP_STATUS_BAD_AMQP_DATA;
+ }
+ state->target_size = frame_size + HEADER_SIZE + FOOTER_SIZE;
if ((size_t)state->frame_max < state->target_size) {
return AMQP_STATUS_BAD_AMQP_DATA;
}