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60 lines
2.0 KiB
60 lines
2.0 KiB
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="202105-38">
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<title>nginx: Remote code execution</title>
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<synopsis>A vulnerability in nginx could lead to remote code execution.</synopsis>
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<product type="ebuild">nginx</product>
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<announced>2021-05-26</announced>
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<revised count="1">2021-05-26</revised>
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<bug>792087</bug>
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<access>remote</access>
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<affected>
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<package name="www-servers/nginx" auto="yes" arch="*">
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<unaffected range="ge" slot="0">1.20.1</unaffected>
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<unaffected range="ge" slot="mainline">1.21.0</unaffected>
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<vulnerable range="lt">1.21.0</vulnerable>
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</package>
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</affected>
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<background>
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<p>nginx is a robust, small, and high performance HTTP and reverse proxy
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server.
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</p>
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</background>
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<description>
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<p>It was discovered that nginx did not properly handle DNS responses when
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“resolver” directive is used.
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</p>
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</description>
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<impact type="high">
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<p>A remote attacker, able to provide DNS responses to a nginx instance,
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could cause the execution of arbitrary code with the privileges of the
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process or a Denial of Service condition.
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</p>
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</impact>
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<workaround>
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<p>There is no known workaround at this time.</p>
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</workaround>
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<resolution>
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<p>All nginx users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=www-servers/nginx-1.20.1"
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</code>
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<p>All nginx mainline users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose
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">=www-servers/nginx-1.21.0:mainline"
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</code>
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</resolution>
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<references>
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<uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-23017">CVE-2021-23017</uri>
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</references>
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<metadata tag="requester" timestamp="2021-05-26T17:05:23Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2021-05-26T17:40:33Z">whissi</metadata>
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</glsa>
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