xml/htdocs/security/en/glsa/glsa-200507-21.xml


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

<glsa id="200507-21">
  <title>fetchmail: Buffer Overflow</title>
  <synopsis>
    fetchmail is susceptible to a buffer overflow resulting in a Denial of
    Service or arbitrary code execution.
  </synopsis>
  <product type="ebuild">fetchmail</product>
  <announced>July 25, 2005</announced>
  <revised>July 25, 2005: 01</revised>
  <bug>99865</bug>
  <access>remote</access>
  <affected>
    <package name="net-mail/fetchmail" auto="yes" arch="*">
      <unaffected range="ge">6.2.5.2</unaffected>
      <vulnerable range="lt">6.2.5.2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    fetchmail is a utility that retrieves and forwards mail from
    remote systems using IMAP, POP, and other protocols.
    </p>
  </background>
  <description>
    <p>
    fetchmail does not properly validate UIDs coming from a POP3 mail
    server. The UID is placed in a fixed length buffer on the stack, which
    can be overflown.
    </p>
  </description>
  <impact type="normal">
    <p>
    Very long UIDs returned from a malicious or compromised POP3
    server can cause fetchmail to crash, resulting in a Denial of Service,
    or allow arbitrary code to be placed on the stack.
    </p>
  </impact>
  <workaround>
    <p>
    There are no known workarounds at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All fetchmail users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-mail/fetchmail-6.2.5.2&quot;</code>
  </resolution>
  <references>
    <uri link="http://fetchmail.berlios.de/fetchmail-SA-2005-01.txt">Fetchmail Security Advisory</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2335">CAN-2005-2335</uri>
  </references>
  <metadata tag="submitter" timestamp="Fri, 22 Jul 2005 05:37:13 +0000">
    r2d2
  </metadata>
  <metadata tag="bugReady" timestamp="Sun, 24 Jul 2005 07:43:36 +0000">
    adir
  </metadata>
</glsa>