From 9af2b9d815632fc4d28fcd4306f5599e15b237ef Mon Sep 17 00:00:00 2001
From: Ivan Nardi <12729895+IvanNardi@users.noreply.github.com>
Date: Sat, 3 Feb 2024 04:11:58 +0100
Subject: collectd: fix extraction of hostname (#2301)

---
 src/lib/protocols/collectd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lib/protocols/collectd.c b/src/lib/protocols/collectd.c
index 500b9a3f3..d4586d90a 100644
--- a/src/lib/protocols/collectd.c
+++ b/src/lib/protocols/collectd.c
@@ -159,7 +159,8 @@ static void ndpi_search_collectd(struct ndpi_detection_module_struct *ndpi_struc
          * the collectd protocol.
          */
         hostname_offset = block_offset;
-        hostname_length = block_length;
+        if(block_length > 4)
+          hostname_length = block_length - 4; /* Ignore type and length fields */
       } else if (block_type == COLELCTD_TYPE_ENCR_AES256) {
         /*
          * The encrypted data block is a special case.
-- 
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