glsa-202101-01.xml


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<?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 "&gt;=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>