File: 281.txt

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Rule:  

--
Sid:
281

--
Summary:
This event is generated when an attempt is made to issue a Denial of 
Service (DoS) attack that causes some Ascend routers to reboot.

--
Impact:
Denial of Service. Traffic between network segments or between internal 
and external networks can be disrupted.

--
Detailed Information:
Some Ascend routers run configuration software that is able to locate 
other Ascend routers by broadcasting on UDP port 9 (discard).  This port
is listened on by the Java Configurator tool.  A packet with a specially
crafted payload can cause the routers to reboot.

--
Affected Systems:
	Lucent Ascend MAX Router 5.0 and previous
	Lucent Ascend Pipeline Router 6.0 and previous
	Lucent Ascend Pipeline Router 6.0 and previous


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Attack Scenarios:
Ascend routers can be forced to reboot remotely without authorization.  
Since the offending packet is UDP (which is not connection oriented), 
the sending address can be easily spoofed.  

--
Ease of Attack:
Simple.  An exploit is available.

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False Positives:
None known.

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False Negatives:
None known.

--
Corrective Action:
An upgrade is available from the manufacturer.  Filtering traffic to 
port 9 will also prevent this exploit.  

--
Contributors:
Original Rule Writer Unknown
Sourcefire Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Steven Alexander<alexander.s@mccd.edu>

-- 
Additional References:

Arachnids:
http://www.whitehats.com/info/IDS262

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0060

Bugtraq:
http://www.securityfocus.com/bid/714

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