From 80aa96429410c13a26cb0618217ff8f4f0ba8c42 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Notin?= <clement@notin.org>
Date: Mon, 4 Feb 2019 11:46:08 +0100
Subject: [PATCH] FindSMB2UPTime: properly deal with servers not disclosing
 their boot time

---
 tools/FindSMB2UPTime.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/FindSMB2UPTime.py b/tools/FindSMB2UPTime.py
index c39cce5..d912cca 100755
--- a/tools/FindSMB2UPTime.py
+++ b/tools/FindSMB2UPTime.py
@@ -25,12 +25,18 @@ from packets import SMBHeaderReq, SMB2NegoReq, SMB2NegoDataReq
 
 def GetBootTime(data):
     Filetime = int(struct.unpack('<q',data)[0])
+    if Filetime == 0:  # server may not disclose this info
+        return 0, "Unknown"
     t = divmod(Filetime - 116444736000000000, 10000000)
     time = datetime.datetime.fromtimestamp(t[0])
     return time, time.strftime('%Y-%m-%d %H:%M:%S')
 
 
 def IsDCVuln(t, host):
+    if t[0] == 0:
+        print "Server", host[0], "did not disclose its boot time"
+        return
+    
     Date = datetime.datetime(2014, 11, 17, 0, 30)
     if t[0] < Date:
        print "System is up since:", t[1]