glsa-201702-23.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201702-23">
  <title>Dropbear: Multiple vulnerabilities</title>
  <synopsis>Multiple vulnerabilities have been found in Dropbear, the worst of
    which allows remote attackers to execute arbitrary code.
  </synopsis>
  <product type="ebuild">dropbear</product>
  <announced>2017-02-20</announced>
  <revised count="1">2017-02-20</revised>
  <bug>605560</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/dropbear" auto="yes" arch="*">
      <unaffected range="ge">2016.74</unaffected>
      <vulnerable range="lt">2016.74</vulnerable>
    </package>
  </affected>
  <background>
    <p>Dropbear is an SSH server and client designed with a small memory
      footprint.
    </p>
  </background>
  <description>
    <p>Multiple vulnerabilities have been discovered in Dropbear. Please review
      the CVE identifiers referenced below for details.
    </p>
  </description>
  <impact type="normal">
    <p>A remote attacker could possibly execute arbitrary code with root
      privileges if usernames containing special characters can be created on a
      system. Also, a dbclient user who can control username or host arguments
      could potentially run arbitrary code with the privileges of the process.
    </p>
    
    <p>In addition, a remote attacker could entice a user to process a
      specially crafted SSH key using dropbearconvert, possibly resulting in
      execution of arbitrary code with the privileges of the process or a
      Denial of Service condition.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Dropbear users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=net-misc/dropbear-2016.74"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7406">CVE-2016-7406</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7407">CVE-2016-7407</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7408">CVE-2016-7408</uri>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-7409">CVE-2016-7409</uri>
  </references>
  <metadata tag="requester" timestamp="2017-02-05T22:53:36Z">b-man</metadata>
  <metadata tag="submitter" timestamp="2017-02-20T23:45:39Z">whissi</metadata>
</glsa>