Add bounds check before length read
@@ -2057,6 +2057,12 @@ static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
*
* opaque psk_identity_hint<0..2^16-1>;
*/
+ if( (*p) > end - 2 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
+ "(psk_identity_hint length)" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
len = (*p)[0] << 8 | (*p)[1];
*p += 2;
