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	<title>DNS Server Cache Snooping Remote Information Disclosure &#8211; 21點情報網</title>
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		<title>Bind服務被弱點掃描檢測出「DNS Server Cache Snooping Remote Information Disclosure」如何改善</title>
		<link>https://ailog.tw/lifelog/2021/09/28/allow-query-cache/</link>
		
		<dc:creator><![CDATA[blackjack]]></dc:creator>
		<pubDate>Tue, 28 Sep 2021 07:24:05 +0000</pubDate>
				<category><![CDATA[3C資訊]]></category>
		<category><![CDATA[FreeBSD]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[BIND]]></category>
		<category><![CDATA[DNS]]></category>
		<category><![CDATA[DNS Server Cache Snooping Remote Information Disclosure]]></category>
		<category><![CDATA[freebsd]]></category>
		<category><![CDATA[named]]></category>
		<category><![CDATA[Nessus Plugin ID 12217]]></category>
		<category><![CDATA[弱點掃描]]></category>
		<guid isPermaLink="false">https://ailog.tw/lifelog/?p=11207</guid>

					<description><![CDATA[透過Linux/FreeBSD主機架設DNS Server不意外都是採用BIND套件，但如果弱點掃描偵測出「D &#8230; <p class="link-more"><a href="https://ailog.tw/lifelog/2021/09/28/allow-query-cache/" class="more-link">閱讀全文<span class="screen-reader-text">〈Bind服務被弱點掃描檢測出「DNS Server Cache Snooping Remote Information Disclosure」如何改善〉</span></a></p>]]></description>
										<content:encoded><![CDATA[<p><span style="font-size: 14pt; font-family: verdana, geneva;">透過Linux/FreeBSD主機架設DNS Server不意外都是採用BIND套件，但如果弱點掃描偵測出「DNS Server Cache Snooping Remote Information Disclosure」相關的風險，該如何排除呢?<br />
小編今天分享一下處理的過程。<span id="more-11207"></span></span></p>
<p><span style="font-size: 14pt; font-family: verdana, geneva;">弱點掃描影響說明：</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><a href="https://www.tenable.com/plugins/nessus/12217">https://www.tenable.com/plugins/nessus/12217</a><br />
</span></p>
<p><span style="font-size: 14pt; font-family: verdana, geneva;">[範例情境]</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">01、作業系統為FreeBSD 12.2-RELEASE-p7</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">02、BIND版本為9.16.16</span></p>
<p><span style="font-size: 14pt; font-family: verdana, geneva;">[操作步驟]</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">01、變更BIND設定檔<br />
(1)、編輯設定檔</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">指令語法：</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><span style="font-family: verdana, geneva;">vi /usr/local/etc/namedb/named.conf<br />
<img fetchpriority="high" decoding="async" class="alignnone wp-image-11209 size-full" src="https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-01.png" alt="" width="713" height="86" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-01.png 713w, https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-01-300x36.png 300w" sizes="(max-width: 713px) 100vw, 713px" /></span></span></p>
<p><span style="font-size: 14pt; font-family: verdana, geneva;">(2)、修改設定參數</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">在options選項裡面新增下列設定值<br />
options {</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">allow-query-cache { none; };</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;">};</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img decoding="async" class="alignnone wp-image-11210 size-full" src="https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-02.png" alt="" width="567" height="248" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-02.png 567w, https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-02-300x131.png 300w" sizes="(max-width: 567px) 100vw, 567px" /></span></p>
<p><span style="font-size: 14pt; font-family: verdana, geneva;">02、重新啟動BIND服務<br />
指令語法：<br />
/usr/local/etc/rc.d/named restart</span><br />
<span style="font-size: 14pt; font-family: verdana, geneva;"><img decoding="async" class="alignnone wp-image-11211 size-full" src="https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-03.png" alt="" width="687" height="114" srcset="https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-03.png 687w, https://ailog.tw/lifelog/wp-content/uploads/2021/09/allow-query-cache-03-300x50.png 300w" sizes="(max-width: 687px) 100vw, 687px" /></span><span style="font-size: 14pt; font-family: verdana, geneva;"><br />
</span></p>
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