glsa-202105-01.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202105-01">
  <title>Exim: Multiple vulnerabilities</title>
  <synopsis>Multiple vulnerabilities have been found in Exim, the worst of
    which allows remote attackers to execute arbitrary code.
  </synopsis>
  <product type="ebuild">exim</product>
  <announced>2021-05-04</announced>
  <revised count="1">2021-05-04</revised>
  <bug>786945</bug>
  <access>local, remote</access>
  <affected>
    <package name="mail-mta/exim" auto="yes" arch="*">
      <unaffected range="ge">4.94.2</unaffected>
      <vulnerable range="lt">4.94.2</vulnerable>
    </package>
  </affected>
  <background>
    <p>Exim is a message transfer agent (MTA) designed to be a a highly
      configurable, drop-in replacement for sendmail.
    </p>
  </background>
  <description>
    <p>Multiple vulnerabilities have been discovered in Exim. Please review the
      CVE identifiers referenced below for details.
    </p>
  </description>
  <impact type="high">
    <p>A remote attacker, by connecting to the SMTP listener daemon, could
      possibly execute arbitrary code with the privileges of the process or
      cause a Denial of Service condition. Furthermore, a local attacker could
      perform symlink attacks to overwrite arbitrary files with the privileges
      of the user running the application or escalate privileges.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Exim users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=mail-mta/exim-4.94.2"
    </code>
    
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28007">CVE-2020-28007</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28008">CVE-2020-28008</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28009">CVE-2020-28009</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28010">CVE-2020-28010</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28011">CVE-2020-28011</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28012">CVE-2020-28012</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28013">CVE-2020-28013</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28014">CVE-2020-28014</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28015">CVE-2020-28015</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28016">CVE-2020-28016</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28017">CVE-2020-28017</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28018">CVE-2020-28018</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28019">CVE-2020-28019</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28020">CVE-2020-28020</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28021">CVE-2020-28021</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28022">CVE-2020-28022</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28023">CVE-2020-28023</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28024">CVE-2020-28024</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28025">CVE-2020-28025</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2020-28026">CVE-2020-28026</uri>
    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-27216">CVE-2021-27216</uri>
  </references>
  <metadata tag="requester" timestamp="2021-05-04T18:26:25Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2021-05-04T19:29:15Z">whissi</metadata>
</glsa>