<div dir="ltr"><div>This is a very well instrumented check/block/sig etc.. for most IDS/IPS systems.. Probably the script triggers the event since it sends traffic attempting to detect whether the system is vulnerable.<br>
</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Nov 8, 2013 at 7:16 AM, rmkml <span dir="ltr"><<a href="mailto:rmkml@yahoo.fr" target="_blank">rmkml@yahoo.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Carlopmart,<br>
<br>
Well this sig only detect UUID and Bind (not overflow),<br>
<br>
MS08-067 already detected by another sigs:<br>
2008690 + 2008691 + 2008692 + 2008693 + 2008694 + 2008696 +<br>
2008697 + 2008698 + 2008699 + 2008700 + 2008702 + 2008703 +<br>
2008704 + 2008705 + 2008706 + 2008707 + 2008708 + 2008709 +<br>
2008710 + 2008712 + 2008713 + 2008714 + 2008715 + 2008717 +<br>
2008718 + 2008719 + 2008720 + 2008721.<br>
<br>
Maybe disable/delete this sig (2008701) ?<br>
<br>
Regards<span class="HOEnZb"><font color="#888888"><br>
@Rmkml</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
<br>
<br>
On Tue, 5 Nov 2013, Peter Manev wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Tue, Nov 5, 2013 at 12:59 PM, C. L. Martinez <<a href="mailto:carlopmart@gmail.com" target="_blank">carlopmart@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Tue, Nov 5, 2013 at 11:54 AM, Peter Manev <<a href="mailto:petermanev@gmail.com" target="_blank">petermanev@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Tue, Nov 5, 2013 at 12:42 PM, C. L. Martinez <<a href="mailto:carlopmart@gmail.com" target="_blank">carlopmart@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi all,<br>
<br>
From time to time my suricata sensors (all of them using release<br>
1.4.6) trigger alerts about MS08-06 vulnerability in my servers and/or<br>
workstations (ten or fifteen times a day).<br>
<br>
I run the following nmap script<br>
<a href="http://nmap.org/nsedoc/scripts/smb-check-vulns.html" target="_blank">http://nmap.org/nsedoc/<u></u>scripts/smb-check-vulns.html</a> to check this<br>
vulnerability, and result is not vulnerable. For example:<br>
<br>
root@debian01:/tmp# nmap --script smb-check-vulns.nse -p445 10.15.1.2<br>
<br>
Starting Nmap 6.00 ( <a href="http://nmap.org" target="_blank">http://nmap.org</a> ) at 2013-11-05 11:38 UTC<br>
Nmap scan report for mytest.server.local (10.15.1.2)<br>
Host is up (0.00049s latency).<br>
PORT STATE SERVICE<br>
445/tcp open microsoft-ds<br>
<br>
Host script results:<br>
| smb-check-vulns:<br>
| MS08-067: NOT VULNERABLE<br>
| Conficker: Likely CLEAN<br>
| regsvc DoS: CHECK DISABLED (add '--script-args=unsafe=1' to run)<br>
| SMBv2 DoS (CVE-2009-3103): CHECK DISABLED (add<br>
'--script-args=unsafe=1' to run)<br>
| MS06-025: CHECK DISABLED (remove 'safe=1' argument to run)<br>
|_ MS07-029: CHECK DISABLED (remove 'safe=1' argument to run)<br>
<br>
Nmap done: 1 IP address (1 host up) scanned in 0.43 seconds<br>
<br>
Then, why this alert is triggered?? Any idea??<br>
</blockquote>
<br>
<br>
What is the sig/alert that is generated ?<br>
</blockquote>
<br>
This one:<br>
<br>
ET-emerging-netbios.rules:<u></u>alert tcp any any -> $HOME_NET 445 (msg:"ET<br>
NETBIOS Microsoft Windows NETAPI Stack Overflow Inbound - MS08-067<br>
(11)"; flow:established,to_server; content:"|0B|"; offset:2; depth:1;<br>
content:"|C8 4F 32 4B 70 16 D3 01 12 78 5A 47 BF 6E E1 88|";<br>
reference:url,<a href="http://www.microsoft.com/technet/security/Bulletin/MS08-067.mspx" target="_blank">www.microsoft.<u></u>com/technet/security/Bulletin/<u></u>MS08-067.mspx</a>;<br>
reference:cve,2008-4250; reference:url,<a href="http://www.kb.cert.org/vuls/id/827267" target="_blank">www.kb.cert.org/<u></u>vuls/id/827267</a>;<br>
reference:url,<a href="http://doc.emergingthreats.net/bin/view/Main/2008701" target="_blank">doc.<u></u>emergingthreats.net/bin/view/<u></u>Main/2008701</a>;<br>
classtype:attempted-admin; sid:2008701; rev:5;)<br>
<br>
and sensor alert is:<br>
<br>
11/05/2013-08:05:11.830795 [**] [1:2008701:5] ET NETBIOS Microsoft<br>
Windows NETAPI Stack Overflow Inbound - MS08-067 (11) [**]<br>
[Classification: Attempted Administrator Privilege Gain] [Priority: 1]<br>
{TCP} <a href="http://10.17.23.33:1306" target="_blank">10.17.23.33:1306</a> -> <a href="http://10.15.1.2:445" target="_blank">10.15.1.2:445</a><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Do you alert when doing the scan (if you run the scan fro the "external net") ?<br>
</blockquote>
<br>
Nop, alert is triggered when workstations tries to access to file servers ..<br>
<br>
</blockquote>
<br>
Is it possible to share a small traffic pcap, where you can reproduce the issue?<br>
<br>
<br>
-- <br>
Regards,<br>
Peter Manev<br>
</blockquote>
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</div></div></blockquote></div><br></div>