glsa-201709-12.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201709-12">
  <title>Perl: Race condition vulnerability</title>
  <synopsis>A vulnerability in module File::Path for Perl allows local
    attackers to set arbitrary mode values on arbitrary files bypassing
    security restrictions.
  </synopsis>
  <product type="ebuild">perl</product>
  <announced>2017-09-17</announced>
  <revised count="1">2017-09-17</revised>
  <bug>620304</bug>
  <access>local</access>
  <affected>
    <package name="dev-lang/perl" auto="yes" arch="*">
      <unaffected range="ge">5.24.1-r2</unaffected>
      <vulnerable range="lt">5.24.1-r2</vulnerable>
    </package>
    <package name="perl-core/File-Path" auto="yes" arch="*">
      <unaffected range="ge">2.130.0</unaffected>
      <vulnerable range="lt">2.130.0</vulnerable>
    </package>
    <package name="virtual/perl-File-Path" auto="yes" arch="*">
      <unaffected range="ge">2.130.0</unaffected>
      <vulnerable range="lt">2.130.0</vulnerable>
    </package>
  </affected>
  <background>
    <p>File::Path module provides a convenient way to create directories of
      arbitrary depth and to delete an entire directory subtree from the
      filesystem.
    </p>
  </background>
  <description>
    <p>A race condition occurs within concurrent environments. This condition
      was discovered by The cPanel Security Team in the rmtree and remove_tree
      functions in the File-Path module before 2.13 for Perl. This is due to
      the  time-of-check-to-time-of-use (TOCTOU) race condition between the
      stat() that decides the inode is a directory and the chmod() that tries
      to make it user-rwx.
    </p>
  </description>
  <impact type="normal">
    <p>A local attacker could exploit this condition to set arbitrary mode
      values on arbitrary files and hence bypass security restrictions.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All Perl users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=dev-lang/perl-5.24.1-r2"
    </code>
    
    <p>All File-Path users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=perl-core/File-Path-2.130.0"
    </code>
    
    <p>All Perl-File-Path users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=virtual/perl-File-Path-2.130.0"
    </code>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-6512">
      CVE-2017-6512
    </uri>
  </references>
  <metadata tag="requester" timestamp="2017-09-12T03:14:08Z">chrisadr</metadata>
  <metadata tag="submitter" timestamp="2017-09-17T19:28:53Z">chrisadr</metadata>
</glsa>