glsa-200502-13.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200502-13">
  <title>Perl: Vulnerabilities in perl-suid wrapper</title>
  <synopsis>
    Vulnerabilities leading to file overwriting and code execution with
    elevated privileges have been discovered in the perl-suid wrapper.
  </synopsis>
  <product type="ebuild">Perl</product>
  <announced>2005-02-11</announced>
  <revised count="01">2005-02-11</revised>
  <bug>80460</bug>
  <access>local</access>
  <affected>
    <package name="dev-lang/perl" auto="yes" arch="*">
      <unaffected range="ge">5.8.6-r3</unaffected>
      <unaffected range="rge">5.8.5-r4</unaffected>
      <unaffected range="rge">5.8.4-r3</unaffected>
      <unaffected range="rge">5.8.2-r3</unaffected>
      <vulnerable range="lt">5.8.6-r3</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Perl is a stable, cross-platform programming language created by
    Larry Wall. The perl-suid wrapper allows the use of setuid perl
    scripts, i.e. user-callable Perl scripts which have elevated
    privileges. This function is enabled only if you have the perlsuid USE
    flag set.
    </p>
  </background>
  <description>
    <p>
    perl-suid scripts honor the PERLIO_DEBUG environment variable and
    write to that file with elevated privileges (CAN-2005-0155).
    Furthermore, calling a perl-suid script with a very long path while
    PERLIO_DEBUG is set could trigger a buffer overflow (CAN-2005-0156).
    </p>
  </description>
  <impact type="high">
    <p>
    A local attacker could set the PERLIO_DEBUG environment variable
    and call existing perl-suid scripts, resulting in file overwriting and
    potentially the execution of arbitrary code with root privileges.
    </p>
  </impact>
  <workaround>
    <p>
    You are not vulnerable if you do not have the perlsuid USE flag
    set or do not use perl-suid scripts.
    </p>
  </workaround>
  <resolution>
    <p>
    All Perl users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose dev-lang/perl</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0155">CAN-2005-0155</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0156">CAN-2005-0156</uri>
  </references>
  <metadata tag="requester" timestamp="2005-02-04T14:45:58Z">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="2005-02-11T15:34:36Z">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="2005-02-11T16:11:49Z">
    koon
  </metadata>
</glsa>