fef748c3be
Fix Denial of Service vulnerability in named(8) with DNS64. [13:01] Fix Denial of Service vulnerability in libc's glob(3) functionality. [13:02] Security: CVE-2012-5688 Security: FreeBSD-SA-13:01.bind Security: CVE-2010-2632 Security: FreeBSD-SA-13:02.libc
122 lines
4.1 KiB
Text
122 lines
4.1 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
Hash: SHA1
|
|
|
|
=============================================================================
|
|
FreeBSD-SA-13:01.bind Security Advisory
|
|
The FreeBSD Project
|
|
|
|
Topic: BIND remote DoS with deliberately crafted DNS64 query
|
|
|
|
Category: contrib
|
|
Module: bind
|
|
Announced: 2013-02-19
|
|
Affects: FreeBSD 9.x and later
|
|
Corrected: 2013-01-08 09:05:09 UTC (stable/9, 9.1-STABLE)
|
|
2013-02-19 13:27:20 UTC (releng/9.0, 9.0-RELEASE-p6)
|
|
2013-02-19 13:27:20 UTC (releng/9.1, 9.1-RELEASE-p1)
|
|
CVE Name: CVE-2012-5688
|
|
|
|
For general information regarding FreeBSD Security Advisories,
|
|
including descriptions of the fields above, security branches, and the
|
|
following sections, please visit <URL:http://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.
|
|
|
|
DNS64 is an IPv6 transition mechanism that will return a synthesized
|
|
AAAA response even if there is only an A record available.
|
|
|
|
II. Problem Description
|
|
|
|
Due to a software defect a crafted query can cause named(8) to crash
|
|
with an assertion failure.
|
|
|
|
III. Impact
|
|
|
|
If named(8) is configured to use DNS64, an attacker who can send it a
|
|
query can cause named(8) to crash, resulting in a denial of service.
|
|
|
|
IV. Workaround
|
|
|
|
No workaround is available, but systems not configured to use DNS64
|
|
using the "dns64" configuration statement are not vulnerable. DNS64
|
|
is not enabled in the default configuration on FreeBSD.
|
|
|
|
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.
|
|
|
|
Restart the named(8) daemon, or reboot your system.
|
|
|
|
2) 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 http://security.FreeBSD.org/patches/SA-13:01/bind.patch
|
|
# fetch http://security.FreeBSD.org/patches/SA-13:01/bind.patch.asc
|
|
# gpg --verify bind.patch.asc
|
|
|
|
b) Execute the following commands as root:
|
|
|
|
# cd /usr/src
|
|
# patch < /path/to/patch
|
|
|
|
Recompile the operating system using buildworld and installworld as
|
|
described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>.
|
|
|
|
Restart the named(8) daemon, or reboot your system.
|
|
|
|
3) 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
|
|
|
|
Restart the named(8) daemon, or reboot your system.
|
|
|
|
4) Alternatively, install and run BIND from the Ports Collection after
|
|
the correction date. The following versions and newer versions of
|
|
BIND installed from the Ports Collection are not affected by this
|
|
vulnerability:
|
|
|
|
bind98-9.8.4.1
|
|
bind99-9.9.2.1
|
|
|
|
VI. Correction details
|
|
|
|
The following list contains the revision numbers of each file that was
|
|
corrected in FreeBSD.
|
|
|
|
Branch/path Revision
|
|
- -------------------------------------------------------------------------
|
|
stable/9/ r245163
|
|
releng/9.0/ r246989
|
|
releng/9.1/ r246989
|
|
- -------------------------------------------------------------------------
|
|
|
|
VII. References
|
|
|
|
https://kb.isc.org/article/AA-00828
|
|
|
|
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-5688
|
|
|
|
The latest revision of this advisory is available at
|
|
http://security.FreeBSD.org/advisories/FreeBSD-SA-13:01.bind.asc
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: GnuPG v1.4.12 (FreeBSD)
|
|
|
|
iEYEARECAAYFAlEjf8MACgkQFdaIBMps37JUigCeIvjGL59H2froSeFqfPvlzM7L
|
|
XpAAni7nW5GZt4AE3eSDQwE4ivCne6SK
|
|
=Rxq4
|
|
-----END PGP SIGNATURE-----
|