-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - ------------------------------------------------------------------------ Debian Security Advisory DSA-1605-1 security@xxxxxxxxxx http://www.debian.org/security/ Florian Weimer July 08, 2008 http://www.debian.org/security/faq - ------------------------------------------------------------------------ Package : glibc Vulnerability : DNS cache poisoning Problem type : remote Debian-specific: no CVE Id(s) : CVE-2008-1447 CERT advisory : VU#800113 Dan Kaminsky discovered that properties inherent to the DNS protocol lead to practical DNS spoofing and cache poisoning attacks. Among other things, successful attacks can lead to misdirected web traffic and email rerouting. At this time, it is not possible to implement the recommended countermeasures in the GNU libc stub resolver. The following workarounds are available: 1. Install a local BIND 9 resoler on the host, possibly in forward-only mode. BIND 9 will then use source port randomization when sending queries over the network. (Other caching resolvers can be used instead.) 2. Rely on IP address spoofing protection if available. Successful attacks must spoof the address of one of the resolvers, which may not be possible if the network is guarded properly against IP spoofing attacks (both from internal and external sources). This DSA will be updated when patches for hardening the stub resolver are available. - --------------------------------------------------------------------------------- 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 v1.4.6 (GNU/Linux) iQEVAwUBSHOIFr97/wQC1SS+AQIscwf+KBKMT4hcpB5TCNE+0v1DNBHiQ4rh7ktz KiOyLWEJOaxOrpsR8siA6B6newiLe5KfwojDikqSCXbubTCeicj79HTCx5DzzhTm aa3HePARxmtN1AuyFCebOfklibTtyY/gpwydCdAVBiV0+LmD+jXy9Jx4AfyuibXZ VaqkUTj5sUUQn5CacdI1zc1Ky1rzbzRBBoNJ1D1rRBU1wjoGsvVjBV9p24j/1E2c mYtbY3g1FKmhnOTLBac/AAW62ZQ44yf4QcGgwV8CULfi5c2QmGiRYZioWDVd0pfZ hr2h/Vmjs2qgf8B9FmYet0hEGm6SrEryT2ievlqXkpul0MYtHjJ5iw== =CMHb -----END PGP SIGNATURE-----
