<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="202101-01"> <title>Dovecot: Multiple vulnerabilities</title> <synopsis>Multiple vulnerabilities have been found in Dovecot, the worst of which could allow remote attackers to cause a Denial of Service condition. </synopsis> <product type="ebuild">dovecot</product> <announced>2021-01-10</announced> <revised count="1">2021-01-10</revised> <bug>763525</bug> <access>local, remote</access> <affected> <package name="net-mail/dovecot" auto="yes" arch="*"> <unaffected range="ge">2.3.13</unaffected> <vulnerable range="lt">2.3.13</vulnerable> </package> </affected> <background> <p>Dovecot is an open source IMAP and POP3 email server.</p> </background> <description> <p>Multiple vulnerabilities have been discovered in Dovecot. Please review the CVE identifiers referenced below for details. </p> </description> <impact type="normal"> <p>A remote attacker could send a specially crafted mail or send a specially crafted IMAP command possibly resulting in a Denial of Service condition or an authenticated remote attacker might be able to discover the file system directory structure and access other users’ emails. </p> </impact> <workaround> <p>The information disclosure vulnerability can be mitigated by disabling IMAP hibernation feature which isn’t enabled by default. </p> </workaround> <resolution> <p>All Dovecot users should upgrade to the latest version:</p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/dovecot-2.3.13" </code> </resolution> <references> <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-24386">CVE-2020-24386</uri> <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-25275">CVE-2020-25275</uri> </references> <metadata tag="requester" timestamp="2021-01-06T15:39:45Z">whissi</metadata> <metadata tag="submitter" timestamp="2021-01-10T09:16:29Z">whissi</metadata> </glsa>