glsa-200703-03.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">

<glsa id="200703-03">
  <title>ClamAV: Denial of Service</title>
  <synopsis>
    ClamAV contains two vulnerabilities allowing a Denial of Service.
  </synopsis>
  <product type="ebuild">clamav</product>
  <announced>March 02, 2007</announced>
  <revised>March 02, 2007: 01</revised>
  <bug>167201</bug>
  <access>remote</access>
  <affected>
    <package name="app-antivirus/clamav" auto="yes" arch="*">
      <unaffected range="ge">0.90</unaffected>
      <vulnerable range="lt">0.90</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    ClamAV is a GPL virus scanner.
    </p>
  </background>
  <description>
    <p>
    An anonymous researcher discovered a file descriptor leak error in the
    processing of CAB archives and a lack of validation of the "id"
    parameter string used to create local files when parsing MIME headers.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker can send several crafted CAB archives with a
    zero-length record header that will fill the available file descriptors
    until no other is available, which will prevent ClamAV from scanning
    most archives. An attacker can also send an email with specially
    crafted MIME headers to overwrite local files with the permissions of
    the user running ClamAV, such as the virus database file, which could
    prevent ClamAV from detecting any virus.
    </p>
  </impact>
  <workaround>
    <p>
    The first vulnerability can be prevented by refusing any file of type
    CAB, but there is no known workaround for the second issue.
    </p>
  </workaround>
  <resolution>
    <p>
    All ClamAV users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=app-antivirus/clamav-0.90&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0897">CVE-2007-0897</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0898">CVE-2007-0898</uri>
  </references>
  <metadata tag="requester" timestamp="Mon, 26 Feb 2007 22:43:01 +0000">
    falco
  </metadata>
  <metadata tag="submitter" timestamp="Tue, 27 Feb 2007 13:49:10 +0000">
    falco
  </metadata>
  <metadata tag="bugReady" timestamp="Fri, 02 Mar 2007 00:24:54 +0000">
    falco
  </metadata>
</glsa>