what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New

FreeBSD Security Advisory - BIND Denial Of Service

FreeBSD Security Advisory - BIND Denial Of Service
Posted Jul 28, 2015
Site security.freebsd.org

FreeBSD Security Advisory - A remote attacker can trigger a crash of a name server. Both recursive and authoritative servers are affected, and the exposure can not be mitigated by either ACLs or configuration options limiting or denying service because the exploitable code occurs early in the packet handling, before checks enforcing those boundaries.

tags | advisory, remote
systems | freebsd
advisories | CVE-2015-5477
SHA-256 | 846c53d6de99a6145a851883cd99b3ff6c32854a6c9e0c92a215d8bd9d16df91

FreeBSD Security Advisory - BIND Denial Of Service

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

=============================================================================
FreeBSD-SA-15:17.bind Security Advisory
The FreeBSD Project

Topic: BIND remote denial of service vulnerability

Category: contrib
Module: bind
Announced: 2015-07-28
Credits: ISC
Affects: FreeBSD 8.x and FreeBSD 9.x.
Corrected: 2015-07-28 19:58:54 UTC (stable/9, 9.3-STABLE)
2015-07-28 19:59:22 UTC (releng/9.3, 9.3-RELEASE-p21)
2015-07-28 19:58:54 UTC (stable/8, 8.4-STABLE)
2015-07-28 19:59:22 UTC (releng/8.4, 8.4-RELEASE-p35)
CVE Name: CVE-2015-5477

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:https://security.FreeBSD.org/>.

I. Background

BIND 9 is an implementation of the Domain Name System (DNS) protocols.
The named(8) daemon is an Internet Domain Name Server.

II. Problem Description

An error in the handling of TKEY queries can be exploited by an attacker
for use as a denial-of-service vector, as a constructed packet can use
the defect to trigger a REQUIRE assertion failure, causing BIND to exit.

III. Impact

A remote attacker can trigger a crash of a name server. Both recursive and
authoritative servers are affected, and the exposure can not be mitigated
by either ACLs or configuration options limiting or denying service because
the exploitable code occurs early in the packet handling, before checks
enforcing those boundaries.

IV. Workaround

No workaround is available, but systems that are not running BIND are not
vulnerable.

V. Solution

Perform one of the following:

1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.

The named service has to be restarted after the update. A reboot is
recommended but not required.

2) To update your vulnerable system via a binary patch:

Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

The named service has to be restarted after the update. A reboot is
recommended but not required.

3) To update your vulnerable system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

# fetch https://security.FreeBSD.org/patches/SA-15:17/bind.patch
# fetch https://security.FreeBSD.org/patches/SA-15:17/bind.patch.asc
# gpg --verify bind.patch.asc

b) Apply the patch. Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile the operating system using buildworld and installworld as
described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.

Restart the applicable daemons, or reboot the system.

VI. Correction details

The following list contains the correction revision numbers for each
affected branch.

Branch/path Revision
- -------------------------------------------------------------------------
stable/8/ r285977
releng/8.4/ r285980
stable/9/ r285977
releng/9.3/ r285980
- -------------------------------------------------------------------------

To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:

# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base

Or visit the following URL, replacing NNNNNN with the revision number:

<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

VII. References

<URL:https://kb.isc.org/article/AA-01272>

<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5477>

The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-15:17.bind.asc>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.1.6 (FreeBSD)
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=40iD
-----END PGP SIGNATURE-----
Login or Register to add favorites

File Archive:

October 2022

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close