When emitting SSH_MSG_IGNORE to protect against known-IV attacks on CBC,

[u/mdw/putty] / ssh.c

diff --git a/ssh.c b/ssh.c
index 137e460..d4d3d06 100644 (file)
--- a/ssh.c
+++ b/ssh.c
@@ -1864,6 +1864,7 @@ static void ssh2_pkt_defer_noqueue(Ssh ssh, struct Packet *pkt, int noignore)
         * get encrypted with a known IV.
         */
        struct Packet *ipkt = ssh2_pkt_init(SSH2_MSG_IGNORE);
+       ssh2_pkt_addstring_start(ipkt);
        ssh2_pkt_defer_noqueue(ssh, ipkt, TRUE);
     }
     len = ssh2_pkt_construct(ssh, pkt);