what you don't know can hurt you

Red Hat Security Advisory 2011-1819-01

Red Hat Security Advisory 2011-1819-01
Posted Dec 15, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1819-01 - The Dynamic Host Configuration Protocol 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 DHCP request packets when regular expression matching was used in "/etc/dhcp/dhcpd.conf". A remote attacker could use this flaw to crash dhcpd. 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.

tags | advisory, remote, denial of service, protocol
systems | linux, redhat
advisories | CVE-2011-4539
MD5 | 1fb1f1180f22c2433e9e56ee0633281f

Red Hat Security Advisory 2011-1819-01

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: dhcp security update
Advisory ID: RHSA-2011:1819-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1819.html
Issue date: 2011-12-14
CVE Names: CVE-2011-4539
=====================================================================

1. Summary:

Updated dhcp packages that fix one security issue are now available for
Red Hat Enterprise Linux 6.

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:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - 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 DHCP
request packets when regular expression matching was used in
"/etc/dhcp/dhcpd.conf". A remote attacker could use this flaw to crash
dhcpd. (CVE-2011-4539)

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/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

761265 - CVE-2011-4539 dhcp: DoS due to processing certain regular expressions

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

i386:
dhclient-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm

x86_64:
dhclient-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

i386:
dhcp-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm

x86_64:
dhcp-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

x86_64:
dhclient-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

x86_64:
dhcp-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

i386:
dhclient-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm

ppc64:
dhclient-4.1.1-25.P1.el6_2.1.ppc64.rpm
dhcp-4.1.1-25.P1.el6_2.1.ppc64.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.ppc64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.ppc64.rpm

s390x:
dhclient-4.1.1-25.P1.el6_2.1.s390x.rpm
dhcp-4.1.1-25.P1.el6_2.1.s390x.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.s390x.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.s390x.rpm

x86_64:
dhclient-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

i386:
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm

ppc64:
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.ppc.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.ppc64.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.ppc.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.ppc64.rpm

s390x:
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.s390.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.s390x.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.s390.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.s390x.rpm

x86_64:
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

i386:
dhclient-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm

x86_64:
dhclient-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-common-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dhcp-4.1.1-25.P1.el6_2.1.src.rpm

i386:
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm

x86_64:
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-debuginfo-4.1.1-25.P1.el6_2.1.x86_64.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.i686.rpm
dhcp-devel-4.1.1-25.P1.el6_2.1.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-2011-4539.html
https://access.redhat.com/security/updates/classification/#moderate
http://www.isc.org/software/dhcp/advisories/cve-2011-4539

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFO6PNMXlSAg2UNWIIRApbeAKC+qGwPXMyblUNv35s064NjHCmrkQCfRrS/
es3vgT1+FYmB9UVr4cgDpXs=
=8mVI
-----END PGP SIGNATURE-----


--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

January 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jan 1st
    8 Files
  • 2
    Jan 2nd
    11 Files
  • 3
    Jan 3rd
    11 Files
  • 4
    Jan 4th
    2 Files
  • 5
    Jan 5th
    2 Files
  • 6
    Jan 6th
    18 Files
  • 7
    Jan 7th
    15 Files
  • 8
    Jan 8th
    16 Files
  • 9
    Jan 9th
    10 Files
  • 10
    Jan 10th
    13 Files
  • 11
    Jan 11th
    2 Files
  • 12
    Jan 12th
    4 Files
  • 13
    Jan 13th
    21 Files
  • 14
    Jan 14th
    18 Files
  • 15
    Jan 15th
    12 Files
  • 16
    Jan 16th
    18 Files
  • 17
    Jan 17th
    11 Files
  • 18
    Jan 18th
    3 Files
  • 19
    Jan 19th
    2 Files
  • 20
    Jan 20th
    15 Files
  • 21
    Jan 21st
    21 Files
  • 22
    Jan 22nd
    19 Files
  • 23
    Jan 23rd
    19 Files
  • 24
    Jan 24th
    11 Files
  • 25
    Jan 25th
    0 Files
  • 26
    Jan 26th
    0 Files
  • 27
    Jan 27th
    0 Files
  • 28
    Jan 28th
    0 Files
  • 29
    Jan 29th
    0 Files
  • 30
    Jan 30th
    0 Files
  • 31
    Jan 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2016 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close