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Add buffer size check before cert_type_len read

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Krzysztof Stachowiak 2018-04-05 10:20:09 +02:00
parent 8fc134fcb1
commit 57e1a9fdfc
1 changed files with 7 additions and 0 deletions
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7
library/ssl_cli.c
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@ -2456,6 +2456,13 @@ static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
// Retrieve cert types // Retrieve cert types
// //
if( ssl->in_hslen <= mbedtls_ssl_hs_hdr_len( ssl ) )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
}
cert_type_len = buf[mbedtls_ssl_hs_hdr_len( ssl )]; cert_type_len = buf[mbedtls_ssl_hs_hdr_len( ssl )];
n = cert_type_len; n = cert_type_len;