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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202007-21">
<title>Libreswan: Denial of service</title>
<synopsis>A vulnerability in Libreswan could lead to a Denial of Service
condition.
</synopsis>
<product type="ebuild">libreswan</product>
<announced>2020-07-27</announced>
<revised count="1">2020-07-27</revised>
<bug>722696</bug>
<access>remote</access>
<affected>
<package name="net-vpn/libreswan" auto="yes" arch="*">
<unaffected range="ge">3.32</unaffected>
<vulnerable range="lt">3.32</vulnerable>
</package>
</affected>
<background>
<p>Libreswan is a free software implementation of the most widely supported
and standarized VPN protocol based on (“IPsec”) and the Internet Key
Exchange (“IKE”).
</p>
</background>
<description>
<p>As a result of a bug in handling certain bogus encrypted IKEv1, while
building a log message that the packet has been dropped, a NULL pointer
dereference causes Libreswan to crash and restart when it attempts to log
the state name involved.
</p>
</description>
<impact type="normal">
<p>An attacker could cause a possible Denial of Service condition.</p>
</impact>
<workaround>
<p>There is no known workaround at this time.</p>
</workaround>
<resolution>
<p>All Libreswan users should upgrade to the latest version:</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-vpn/libreswan-3.32"
</code>
</resolution>
<references>
<uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-1763">CVE-2020-1763</uri>
</references>
<metadata tag="requester" timestamp="2020-07-26T15:11:54Z">sam_c</metadata>
<metadata tag="submitter" timestamp="2020-07-27T00:05:28Z">sam_c</metadata>
</glsa>
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