glsa-201701-20.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201701-20">
  <title>D-Bus: Format string vulnerability</title>
  <synopsis>A vulnerability has been found in D-Bus possibly resulting in a
    local Denial of Service. 
  </synopsis>
  <product type="ebuild">dbus</product>
  <announced>2017-01-11</announced>
  <revised count="1">2017-01-11</revised>
  <bug>596772</bug>
  <access>local</access>
  <affected>
    <package name="sys-apps/dbus" auto="yes" arch="*">
      <unaffected range="ge">1.10.12</unaffected>
      <vulnerable range="lt">1.10.12</vulnerable>
    </package>
  </affected>
  <background>
    <p>D-Bus is a message bus system, a simple way for applications to talk to
      one another.
    </p>
  </background>
  <description>
    <p>It was discovered that D-Bus incorrectly handles certain format strings.</p>
    
    <p>The impact of this new vulnerability is believed to not be exploitable
      if D-Bus is patched against CVE-2015-0245. The previous vulnerability
      (CVE-2015-0245) was addressed in GLSA-201503-02 referenced below.
    </p>
  </description>
  <impact type="normal">
    <p>A local attacker could cause a Denial of Service condition or possibly
      execute arbitrary code.
    </p>
  </impact>
  <workaround>
    <p>The vulnerable D-Bus interface is intended only for use by systemd
      running as root.
    </p>
    
    <p>The administrator can install a policy which denies sending from 
      org.freedesktop.systemd1.Activator” to D-Bus. This will prevent
      non-root attackers from reaching the interface in order to exercise this
      flaw.
    </p>
  </workaround>
  <resolution>
    <p>All D-Bus users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=sys-apps/dbus-1.10.12"
    </code>
  </resolution>
  <references>
    <uri link="https://security.gentoo.org/glsa/201503-02">GLSA-201503-02</uri>
  </references>
  <metadata tag="requester" timestamp="2017-01-08T23:47:24Z">whissi</metadata>
  <metadata tag="submitter" timestamp="2017-01-11T12:08:23Z">whissi</metadata>
</glsa>