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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202208-11">
<title>Yubico pam-u2f: Local PIN Bypass vulnerability</title>
<synopsis>A vulnerability has been discovered in pam-u2f which could allow a local attacker to bypass PIN entry.</synopsis>
<product type="ebuild">pam_u2f</product>
<announced>2022-08-10</announced>
<revised count="1">2022-08-10</revised>
<bug>792270</bug>
<access>local</access>
<affected>
<package name="sys-auth/pam_u2f" auto="yes" arch="*">
<unaffected range="ge">1.1.1</unaffected>
<vulnerable range="lt">1.1.1</vulnerable>
</package>
</affected>
<background>
<p>Yubico pam-u2f is a PAM module for FIDO2 and U2F keys.</p>
</background>
<description>
<p>A logic issue in Yubico pam-u2f could result in the bypass of a PIN entry requirement when authenticating with FIDO2.</p>
</description>
<impact type="low">
<p>An attacker with local access to certain applications using pam-u2f for authentication could incorrectly successfully authenticate without entering the authentication PIN.</p>
</impact>
<workaround>
<p>There is no known workaround at this time.</p>
</workaround>
<resolution>
<p>All Yubico pam-u2f users should upgrade to the latest version:</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-auth/pam_u2f-1.1.1"
</code>
</resolution>
<references>
<uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-31924">CVE-2021-31924</uri>
<uri>YSA-2021-03</uri>
</references>
<metadata tag="requester" timestamp="2022-08-10T04:07:59.824838Z">ajak</metadata>
<metadata tag="submitter" timestamp="2022-08-10T04:07:59.828973Z">ajak</metadata>
</glsa>
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