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Check key_exchange data length is not 0

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Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Matt Caswell 2016-11-04 09:49:16 +00:00
parent 2ee1271d8f
commit 323f212aa7
1 changed files with 2 additions and 1 deletions
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3
ssl/t1_lib.c
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@ -2754,7 +2754,8 @@ static int ssl_scan_serverhello_tlsext(SSL *s, PACKET *pkt, int *al)
skey = ssl_generate_pkey(ckey);
if (!PACKET_as_length_prefixed_2(&spkt, &encoded_pt)) {
if (!PACKET_as_length_prefixed_2(&spkt, &encoded_pt)
|| PACKET_remaining(&encoded_pt) == 0) {
*al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
SSL_R_LENGTH_MISMATCH);