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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202105-31">
<title>Nettle: Denial of service</title>
<synopsis>A vulnerability in Nettle could lead to a Denial of Service
condition.
</synopsis>
<product type="ebuild">nettle</product>
<announced>2021-05-26</announced>
<revised count="1">2021-05-26</revised>
<bug>780483</bug>
<access>local, remote</access>
<affected>
<package name="dev-libs/nettle" auto="yes" arch="*">
<unaffected range="ge">3.7.2</unaffected>
<vulnerable range="lt">3.7.2</vulnerable>
</package>
</affected>
<background>
<p>Nettle is a cryptographic library that is designed to fit easily in
almost any context: In cryptographic toolkits for object-oriented
languages, such as C++, Python, or Pike, in applications like lsh or
GnuPG, or even in kernel space.
</p>
</background>
<description>
<p>It was discovered that Nettle incorrectly handled signature
verification.
</p>
</description>
<impact type="low">
<p>A remote attacker could send a specially crafted valid-looking input
signature, possibly resulting in a Denial of Service condition or force
an invalid signature.
</p>
</impact>
<workaround>
<p>There is no known workaround at this time.</p>
</workaround>
<resolution>
<p>All Nettle users should upgrade to the latest version:</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.7.2"
</code>
</resolution>
<references>
<uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-20305">CVE-2021-20305</uri>
</references>
<metadata tag="requester" timestamp="2021-05-25T20:00:54Z">whissi</metadata>
<metadata tag="submitter" timestamp="2021-05-26T10:12:28Z">whissi</metadata>
</glsa>
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