54 lines
1.8 KiB
XML
54 lines
1.8 KiB
XML
<?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="202105-20">
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<title>Dnsmasq: DNS cache poisoning</title>
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<synopsis>Use of insufficient randomness in Dnsmasq might lead to DNS Cache
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Poisoning.
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</synopsis>
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<product type="ebuild">dnsmasq</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>782130</bug>
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<access>local, remote</access>
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<affected>
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<package name="net-dns/dnsmasq" auto="yes" arch="*">
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<unaffected range="ge">2.85</unaffected>
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<vulnerable range="lt">2.85</vulnerable>
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</package>
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</affected>
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<background>
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<p>Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP
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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 Dnsmasq, when configured with
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--server=<address>@<interface> or similar (e.g. through dbus),
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configured a fixed UDP port for all outgoing queries to the specified
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upstream DNS server.
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</interface>
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</p>
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</description>
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<impact type="low">
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<p>An attacker, by sending malicious crafted DNS responses, could perform a
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DNS Cache Poisoning attack.
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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 Dnsmasq 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 ">=net-dns/dnsmasq-2.85"
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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-2021-3448">CVE-2021-3448</uri>
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</references>
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<metadata tag="requester" timestamp="2021-05-25T13:34:22Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2021-05-26T08:39:11Z">whissi</metadata>
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</glsa>
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