From 55a27027d5f024a0ecc2c23c81ed99de6192c9f3 Mon Sep 17 00:00:00 2001

From: Daniel Stenberg <daniel@haxx.se>

Date: Fri, 3 May 2019 22:20:37 +0200

Subject: [PATCH] tftp: use the current blksize for recvfrom()

bug: https://curl.haxx.se/docs/CVE-2019-5436.html

Reported-by: l00p3r on hackerone

CVE-2019-5436

Upstream-commit: 2576003415625d7b5f0e390902f8097830b82275

Signed-off-by: Kamil Dudka <kdudka@redhat.com>

---

 lib/tftp.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/tftp.c b/lib/tftp.c

index 269b3cd..4f2a131 100644

--- a/lib/tftp.c

+++ b/lib/tftp.c

@@ -985,7 +985,7 @@ static CURLcode tftp_connect(struct connectdata *conn, bool *done)

   state->sockfd = state->conn->sock[FIRSTSOCKET];

   state->state = TFTP_STATE_START;

   state->error = TFTP_ERR_NONE;

-  state->blksize = TFTP_BLKSIZE_DEFAULT;

+  state->blksize = blksize;

   state->requested_blksize = blksize;

   ((struct sockaddr *)&state->local_addr)->sa_family =

-- 

2.20.1