256.txt

来自「snort入侵检测规则文件2.4 Snort是众所周知的网络入侵检测工具」· 文本 代码 · 共 62 行

Rule:  

--
Sid:
256

--
Summary:
This event is generated when an attempt is made to query authors.bind chaos 
record on a DNS server.  

--
Impact:
Information gathering. This activity may indicate reconnaisance before 
an impending attack.

--
Detailed Information:
Bind 9.x allows you get the authors.bind chaos record.  The ability to
retrieve this file indicates that the machine is running at least a
9.x variant of the bind nameserver.

--
Affected Systems:
	All DNS Servers using Bind
 
--
Attack Scenarios:
As part of a reconnaissance mission, an attacker may attempt to glean
important information about network infrastructure by determining the
bind version on a nameserver. If authors.bind is retrievable, this
indicates that Bind 9.x is in use.

--
Ease of Attack:
Simple.

--
False Positives:
None Known

--
False Negatives:
None Known

--
Corrective Action:
Remove the ability to retrieve the authors.bind chaos record by changing 
the DNS configuration accordingly.

--
Contributors:
Original rule writer unknown
Snort documentation contributed by Jon Hart <[e-mail]>
Sourcefire Vulnerability Research Team
Nigel Houghton <[e-mail]>

-- 
Additional References:

--