-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - ------------------------------------------------------------------------ Debian Security Advisory DSA-1619-1 security@xxxxxxxxxx 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: debian-security-announce@xxxxxxxxxxxxxxxx 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-----
