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authorXin Long <lucien.xin@gmail.com>2021-10-20 07:42:41 -0400
committerJakub Kicinski <kuba@kernel.org>2021-10-22 12:36:43 -0700
commit4f7019c7eb33967eb87766e0e4602b5576873680 (patch)
tree8fd9b74c6777b9f456d7185d324b20fb9eda1a71 /net/sctp/sm_statefuns.c
parent7f678def99d29c520418607509bb19c7fc96a6db (diff)
sctp: use init_tag from inithdr for ABORT chunk
Currently Linux SCTP uses the verification tag of the existing SCTP asoc when failing to process and sending the packet with the ABORT chunk. This will result in the peer accepting the ABORT chunk and removing the SCTP asoc. One could exploit this to terminate a SCTP asoc. This patch is to fix it by always using the initiate tag of the received INIT chunk for the ABORT chunk to be sent. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/sctp/sm_statefuns.c')
-rw-r--r--net/sctp/sm_statefuns.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 32df65f68c12..7f8306968c39 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -6348,6 +6348,7 @@ static struct sctp_packet *sctp_ootb_pkt_new(
* yet.
*/
switch (chunk->chunk_hdr->type) {
+ case SCTP_CID_INIT:
case SCTP_CID_INIT_ACK:
{
struct sctp_initack_chunk *initack;