Linux Security
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Linux Security

Debian: New pdns-recursor packages fix cache poisoning vulnerability

Date 09 Apr 2008
3086
Posted By LinuxSecurity Advisories
Amit Klein discovered that pdns-recursor, a caching DNS resolver, uses a weak random number generator to create DNS transaction IDs and UDP source port numbers. As a result, cache poisoning attacks were simplified.
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Debian Security Advisory DSA-1544-1                This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                         Florian Weimer
April 09, 2008                      https://www.debian.org/security/faq
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Package        : pdns-recursor
Vulnerability  : design flaw
Problem type   : remote
Debian-specific: no
CVE Id(s)      : CVE-2008-1637

Amit Klein discovered that pdns-recursor, a caching DNS resolver, uses a
weak random number generator to create DNS transaction IDs and UDP
source port numbers.  As a result, cache poisoning attacks were
simplified. (CVE-2008-1637)

For the stable distribution (etch), these problems have been fixed in
version 3.1.4-1+etch1.

For the unstable distribution (sid), these problems have been fixed in
version 3.1.5-1.

We recommend that you upgrade your pdns-recursor 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
- -------------------------------

Source archives:

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1.dsc
    Size/MD5 checksum:     1198 e2afc6418e2640188aed92a15d852842
  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4.orig.tar.gz
    Size/MD5 checksum:   171270 e35d774e3282285a59a7f8038a036b61
  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1.diff.gz
    Size/MD5 checksum:    34268 21442fd6cb034c874ae2c353d1bcd968

alpha architecture (DEC Alpha)

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1_alpha.deb
    Size/MD5 checksum:   499010 6dd67b8950e778d9d2fd35114f5fc8f7

amd64 architecture (AMD x86_64 (AMD64))

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1_amd64.deb
    Size/MD5 checksum:   418316 ef549047ec6885aa2f1b908442822c5f

i386 architecture (Intel ia32)

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1_i386.deb
    Size/MD5 checksum:   433732 dd69d1d790baa0637d42252196efa646

ia64 architecture (Intel ia64)

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1_ia64.deb
    Size/MD5 checksum:   598084 6ea10a12ccdcca4bd7c8975dbdd84da0

powerpc architecture (PowerPC)

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1_powerpc.deb
    Size/MD5 checksum:   434082 74ac592edef429defa9236fb4773e065

s390 architecture (IBM S/390)

  https://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch1_s390.deb
    Size/MD5 checksum:   408786 6abd81fab60ae0f87b97d7ccaa1b098c


  These files will probably be moved into the stable distribution on
  its next update.

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For apt-get: deb https://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
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