Prevent arithmetic overflow on bounds check

This commit is contained in:
Krzysztof Stachowiak 2018-03-13 11:29:24 +01:00
parent a1098f81c2
commit 027f84c69f

View File

@ -2489,7 +2489,7 @@ static int ssl_parse_server_key_exchange( mbedtls_ssl_context *ssl )
sig_len = ( p[0] << 8 ) | p[1];
p += 2;
if( end != p + sig_len )
if( p != end - sig_len )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,