From: Devin Carraway <devin@debian.org.>
Date: Sun, 27 Jul 2008 09:36:54 +0000
Subject: [SECURITY] [DSA 1619-1] New python-dns packages fix DNS response spoofing
Priority: urgent
Resent-Message-ID: <XQysIqu3QWL.A.D4F.9GEjIB@liszt.>
Reply-To: [email protected]
Mail-Followup-To: [email protected]
To: [email protected]
Resent-Date: Sun, 27 Jul 2008 09:37:01 +0000 (UTC)
Resent-From: [email protected] (Mailing List Manager)
X-Virus-Scanned: antivirus-gw at tyumen.ru
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- ------------------------------------------------------------------------
Debian Security Advisory DSA-1619-1 [email protected]
http://www.debian.org/security/ Devin Carraway
July 27, 2008 http://www.debian.org/security/faq
- ------------------------------------------------------------------------
Package : python-dns
Vulnerability : DNS response spoofing
Problem type : remote
Debian-specific: no
CVE Id(s) : CVE-2008-1447
Debian Bug : 490217
Multiple weaknesses have been identified in PyDNS, a DNS client
implementation for the Python language. Dan Kaminsky identified a
practical vector of DNS response spoofing and cache poisoning,
exploiting the limited entropy in a DNS transaction ID and lack of
UDP source port randomization in many DNS implementations. Scott
Kitterman noted that python-dns is vulnerable to this predictability,
as it randomizes neither its transaction ID nor its source port.
Taken together, this lack of entropy leaves applications using
python-dns to perform DNS queries highly susceptible to response
forgery.
The Common Vulnerabilities and Exposures project identifies this
class of weakness as CVE-2008-1447.
For the stable distribution (etch), these problems have been fixed in
version 2.3.0-5.2+etch1.
We recommend that you upgrade your python-dns package.
Upgrade instructions
- --------------------
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
apt-get update
will update the internal database
apt-get upgrade
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 4.0 alias etch
- -------------------------------
Debian (stable)
- ---------------
Stable updates are available for alpha, amd64, arm, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc.
Source archives:
http://security.debian.org/pool/updates/main/p/python-dns/python-dns_2.3.0.orig.tar.gz
Size/MD5 checksum: 21084 82d377c6a59181072b30b0da4e9835b8
http://security.debian.org/pool/updates/main/p/python-dns/python-dns_2.3.0-5.2+etch1.diff.gz
Size/MD5 checksum: 3444 06a021e1cf9836cec4bbe72461bab137
http://security.debian.org/pool/updates/main/p/python-dns/python-dns_2.3.0-5.2+etch1.dsc
Size/MD5 checksum: 695 c2e7178128b7033952b7795b358dea0b
Architecture independent packages:
http://security.debian.org/pool/updates/main/p/python-dns/python-dns_2.3.0-5.2+etch1_all.deb
Size/MD5 checksum: 22750 b544ce3edb7d2051811ec743a49206a1
These files will probably be moved into the stable distribution on
its next update.
- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: [email protected]
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<;pkg>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
iD8DBQFIjEBMU5XKDemr/NIRAtOoAJ91jGx81nu4sscNxN4kh/sK6n+IAACgsw9F
tkZYVyRx5dD7xQk0AKMYM4Q=
=2uYK
-----END PGP SIGNATURE-----
