glsa-200408-16.xml


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

<glsa id="200408-16">
  <title>glibc: Information leak with LD_DEBUG</title>
  <synopsis>
    glibc contains an information leak vulnerability allowing the debugging of
    SUID binaries.
  </synopsis>
  <product type="ebuild">glibc</product>
  <announced>August 16, 2004</announced>
  <revised>May 28, 2006: 04</revised>
  <bug>59526</bug>
  <access>local</access>
  <affected>
    <package name="sys-libs/glibc" auto="yes" arch="alpha arm hppa ia64 sparc s390">
      <unaffected range="ge">2.3.2-r11</unaffected>
      <vulnerable range="le">2.3.2-r10</vulnerable>
    </package>
    <package name="sys-libs/glibc" auto="yes" arch="x86 ppc">
      <unaffected range="ge">2.3.3.20040420-r1</unaffected>
      <vulnerable range="le">2.3.3.20040420</vulnerable>
    </package>
    <package name="sys-libs/glibc" auto="yes" arch="mips">
      <unaffected range="ge">2.3.4.20040619-r1</unaffected>
      <vulnerable range="le">2.3.3.20040420</vulnerable>
    </package>
    <package name="sys-libs/glibc" auto="yes" arch="amd64">
      <unaffected range="ge">2.3.4.20040619-r1</unaffected>
      <vulnerable range="le">2.3.4.20040619</vulnerable>
    </package>
    <package name="sys-libs/glibc" auto="yes" arch="ppc64">
      <unaffected range="ge">2.3.4.20040808</unaffected>
      <vulnerable range="le">2.3.4.20040605</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    The GNU C library defines various Unix-like "system calls" and other
    basic facilities needed for a standard POSIX-like application to
    operate.
    </p>
  </background>
  <description>
    <p>
    Silvio Cesare discovered a potential information leak in glibc. It
    allows LD_DEBUG on SUID binaries where it should not be allowed. This
    has various security implications, which may be used to gain
    confidentional information.
    </p>
  </description>
  <impact type="low">
    <p>
    An attacker can gain the list of symbols a SUID application uses and
    their locations and can then use a trojaned library taking precendence
    over those symbols to gain information or perform further exploitation.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time. All users are encouraged to
    upgrade to the latest available version of glibc.
    </p>
  </workaround>
  <resolution>
    <p>
    All glibc users should upgrade to the latest version:
    </p>
    <code>
    # emerge sync
    
    # emerge -pv your_version
    # emerge your_version</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1453">CVE-2004-1453</uri>
  </references>
  <metadata tag="submitter" timestamp="Thu,  5 Aug 2004 17:16:41 +0000">
    jaervosz
  </metadata>
</glsa>