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21 lines
648 B

Fix for TLS record tampering bug. A carefully crafted invalid
handshake could crash OpenSSL with a NULL pointer exception.
Thanks to Anton Johansson for reporting this issues.
(CVE-2013-4353)
diff --git a/ssl/s3_both.c b/ssl/s3_both.c
index 1e5dcab..53b9390 100644
--- a/ssl/s3_both.c
+++ b/ssl/s3_both.c
@@ -210,7 +210,11 @@ static void ssl3_take_mac(SSL *s)
{
const char *sender;
int slen;
-
+ /* If no new cipher setup return immediately: other functions will
+ * set the appropriate error.
+ */
+ if (s->s3->tmp.new_cipher == NULL)
+ return;
if (s->state & SSL_ST_CONNECT)
{
sender=s->method->ssl3_enc->server_finished_label;