Red Hat: 2012:1140-01: dhcp: Moderate Advisory

    Date02 Aug 2012
    CategoryRed Hat
    1631
    Posted ByJoe Shakespeare
    Updated dhcp packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate [More...]
    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Moderate: dhcp security update
    Advisory ID:       RHSA-2012:1140-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1140.html
    Issue date:        2012-08-03
    CVE Names:         CVE-2012-3571 
    =====================================================================
    
    1. Summary:
    
    Updated dhcp packages that fix one security issue are now available for
    Red Hat Enterprise Linux 5.
    
    The Red Hat Security Response Team has rated this update as having moderate
    security impact. A Common Vulnerability Scoring System (CVSS) base score,
    which gives a detailed severity rating, is available from the CVE link in
    the References section.
    
    2. Relevant releases/architectures:
    
    RHEL Desktop Workstation (v. 5 client) - i386, x86_64
    Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
    Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
    
    3. Description:
    
    The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows
    individual devices on an IP network to get their own network configuration
    information, including an IP address, a subnet mask, and a broadcast
    address.
    
    A denial of service flaw was found in the way the dhcpd daemon handled
    zero-length client identifiers. A remote attacker could use this flaw to
    send a specially-crafted request to dhcpd, possibly causing it to enter an
    infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571)
    
    Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as
    the original reporter of this issue.
    
    Users of DHCP should upgrade to these updated packages, which contain a
    backported patch to correct this issue. After installing this update, all
    DHCP servers will be restarted automatically.
    
    4. Solution:
    
    Before applying this update, make sure all previously-released errata
    relevant to your system have been applied.
    
    This update is available via the Red Hat Network. Details on how to
    use the Red Hat Network to apply this update are available at
    https://access.redhat.com/knowledge/articles/11258
    
    5. Bugs fixed (http://bugzilla.redhat.com/):
    
    842420 - CVE-2012-3571 dhcp: DoS due to error in handling malformed client identifiers
    
    6. Package List:
    
    Red Hat Enterprise Linux Desktop (v. 5 client):
    
    Source:
    ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/dhcp-3.0.5-31.el5_8.1.src.rpm
    
    i386:
    dhclient-3.0.5-31.el5_8.1.i386.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
    
    x86_64:
    dhclient-3.0.5-31.el5_8.1.x86_64.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.x86_64.rpm
    libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-3.0.5-31.el5_8.1.x86_64.rpm
    
    RHEL Desktop Workstation (v. 5 client):
    
    Source:
    ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/dhcp-3.0.5-31.el5_8.1.src.rpm
    
    i386:
    dhcp-3.0.5-31.el5_8.1.i386.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
    dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
    
    x86_64:
    dhcp-3.0.5-31.el5_8.1.x86_64.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.x86_64.rpm
    dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
    dhcp-devel-3.0.5-31.el5_8.1.x86_64.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.x86_64.rpm
    
    Red Hat Enterprise Linux (v. 5 server):
    
    Source:
    ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/dhcp-3.0.5-31.el5_8.1.src.rpm
    
    i386:
    dhclient-3.0.5-31.el5_8.1.i386.rpm
    dhcp-3.0.5-31.el5_8.1.i386.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
    dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
    
    ia64:
    dhclient-3.0.5-31.el5_8.1.ia64.rpm
    dhcp-3.0.5-31.el5_8.1.ia64.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.ia64.rpm
    dhcp-devel-3.0.5-31.el5_8.1.ia64.rpm
    libdhcp4client-3.0.5-31.el5_8.1.ia64.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.ia64.rpm
    
    ppc:
    dhclient-3.0.5-31.el5_8.1.ppc.rpm
    dhcp-3.0.5-31.el5_8.1.ppc.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.ppc.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.ppc64.rpm
    dhcp-devel-3.0.5-31.el5_8.1.ppc.rpm
    dhcp-devel-3.0.5-31.el5_8.1.ppc64.rpm
    libdhcp4client-3.0.5-31.el5_8.1.ppc.rpm
    libdhcp4client-3.0.5-31.el5_8.1.ppc64.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.ppc.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.ppc64.rpm
    
    s390x:
    dhclient-3.0.5-31.el5_8.1.s390x.rpm
    dhcp-3.0.5-31.el5_8.1.s390x.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.s390.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.s390x.rpm
    dhcp-devel-3.0.5-31.el5_8.1.s390.rpm
    dhcp-devel-3.0.5-31.el5_8.1.s390x.rpm
    libdhcp4client-3.0.5-31.el5_8.1.s390.rpm
    libdhcp4client-3.0.5-31.el5_8.1.s390x.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.s390.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.s390x.rpm
    
    x86_64:
    dhclient-3.0.5-31.el5_8.1.x86_64.rpm
    dhcp-3.0.5-31.el5_8.1.x86_64.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.i386.rpm
    dhcp-debuginfo-3.0.5-31.el5_8.1.x86_64.rpm
    dhcp-devel-3.0.5-31.el5_8.1.i386.rpm
    dhcp-devel-3.0.5-31.el5_8.1.x86_64.rpm
    libdhcp4client-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-3.0.5-31.el5_8.1.x86_64.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.i386.rpm
    libdhcp4client-devel-3.0.5-31.el5_8.1.x86_64.rpm
    
    These packages are GPG signed by Red Hat for security.  Our key and
    details on how to verify the signature are available from
    https://access.redhat.com/security/team/key/#package
    
    7. References:
    
    https://www.redhat.com/security/data/cve/CVE-2012-3571.html
    https://access.redhat.com/security/updates/classification/#moderate
    http://www.isc.org/software/dhcp/advisories/cve-2012-3571
    
    8. Contact:
    
    The Red Hat security contact is .  More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2012 Red Hat, Inc.
    
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