From ca68beda85b6b2fb8f96d9465997c0a371e3d152 Mon Sep 17 00:00:00 2001 From: Toni Uhlig Date: Tue, 23 Jun 2020 18:33:01 +0200 Subject: Fixed missing length check in fbzero. Signed-off-by: Toni Uhlig --- src/lib/protocols/fbzero.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/lib/protocols/fbzero.c') diff --git a/src/lib/protocols/fbzero.c b/src/lib/protocols/fbzero.c index 6c818e3c7..936d99e84 100644 --- a/src/lib/protocols/fbzero.c +++ b/src/lib/protocols/fbzero.c @@ -85,9 +85,12 @@ void ndpi_search_fbzero(struct ndpi_detection_module_struct *ndpi_struct, char *value = (char*)&packet->payload[data_offset + data_prev_offset]; u_int tag_len = t->tag_offset_len-data_prev_offset, max_len; ndpi_protocol_match_result ret_match; - + max_len = ndpi_min(tag_len, sizeof(flow->host_server_name)-1); + if (data_offset + data_prev_offset + max_len >= packet->payload_packet_len) { + return; + } strncpy((char*)flow->host_server_name, value, max_len); flow->host_server_name[max_len] = '\0'; -- cgit v1.2.3