glsa-200512-09.xml


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

<glsa id="200512-09">
  <title>cURL: Off-by-one errors in URL handling</title>
  <synopsis>
    cURL is vulnerable to local arbitrary code execution via buffer overflow
    due to the insecure parsing of URLs.
  </synopsis>
  <product type="ebuild">cURL</product>
  <announced>December 16, 2005</announced>
  <revised>December 16, 2005: 01</revised>
  <bug>114710</bug>
  <access>local</access>
  <affected>
    <package name="net-misc/curl" auto="yes" arch="*">
      <unaffected range="ge">7.15.1</unaffected>
      <vulnerable range="lt">7.15.1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    cURL is a command line tool for transferring files with URL
    syntax, supporting numerous protocols.
    </p>
  </background>
  <description>
    <p>
    Stefan Esser from the Hardened-PHP Project has reported a
    vulnerability in cURL that allows for a local buffer overflow when cURL
    attempts to parse specially crafted URLs. The URL can be specially
    crafted in one of two ways: the URL could be malformed in a way that
    prevents a terminating null byte from being added to either a hostname
    or path buffer; or the URL could contain a "?" separator in the
    hostname portion, which causes a "/" to be prepended to the resulting
    string.
    </p>
  </description>
  <impact type="low">
    <p>
    An attacker capable of getting cURL to parse a maliciously crafted
    URL could cause a denial of service or execute arbitrary code with the
    privileges of the user making the call to cURL. An attacker could also
    escape open_basedir or safe_mode pseudo-restrictions when exploiting
    this problem from within a PHP program when PHP is compiled with
    libcurl.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All cURL users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-misc/curl-7.15.1&quot;</code>
  </resolution>
  <references>
    <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4077">CVE-2005-4077</uri>
    <uri link="http://www.hardened-php.net/advisory_242005.109.html">Hardened-PHP Advisory</uri>
  </references>
  <metadata tag="requester" timestamp="Wed, 14 Dec 2005 13:39:33 +0000">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="Wed, 14 Dec 2005 17:20:45 +0000">
    shellsage
  </metadata>
  <metadata tag="bugReady" timestamp="Thu, 15 Dec 2005 11:37:18 +0000">
    koon
  </metadata>
</glsa>