glsa-200409-16.xml


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

<glsa id="200409-16">
  <title>Samba: Denial of Service vulnerabilities</title>
  <synopsis>
    Two Denial of Service vulnerabilities have been found and fixed in Samba.
  </synopsis>
  <product type="ebuild">Samba</product>
  <announced>September 13, 2004</announced>
  <revised>September 13, 2004: 01</revised>
  <access>remote</access>
  <affected>
    <package name="net-fs/samba" auto="yes" arch="*">
      <unaffected range="ge">3.0.7</unaffected>
      <unaffected range="lt">3.0</unaffected>
      <vulnerable range="lt">3.0.7</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Samba is a freely available SMB/CIFS implementation which allows seamless
    interoperability of file and print services to other SMB/CIFS clients. smbd
    and nmbd are two daemons used by the Samba server.
    </p>
  </background>
  <description>
    <p>
    There is a defect in smbd's ASN.1 parsing. A bad packet received during the
    authentication request could throw newly-spawned smbd processes into an
    infinite loop (CAN-2004-0807). Another defect was found in nmbd's
    processing of mailslot packets, where a bad NetBIOS request could crash the
    nmbd process (CAN-2004-0808).
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could send specially crafted packets to trigger both
    defects. The ASN.1 parsing issue can be exploited to exhaust all available
    memory on the Samba host, potentially denying all service to that server.
    The nmbd issue can be exploited to crash the nmbd process, resulting in a
    Denial of Service condition on the Samba server.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Samba 3.x users should upgrade to the latest version:
    </p>
    <code>
    # emerge sync

    # emerge -pv ">=net-fs/samba-3.0.7"
    # emerge ">=net-fs/samba-3.0.7"</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0807">CAN-2004-0807</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0808">CAN-2004-0808</uri>
  </references>
  <metadata tag="submitter" timestamp="Sat, 11 Sep 2004 15:16:21 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Mon, 13 Sep 2004 12:15:40 +0000">
    jaervosz
  </metadata>
</glsa>