Debian Security Advisory

DSA-1544-2 pdns-recursor -- design flaw

Date Reported:
16 Jul 2008
Affected Packages:
pdns-recursor
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2008-1637, CVE-2008-3217.
More information:

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 and CVE-2008-3217)

For the stable distribution (etch), these problems have been fixed in version 3.1.4-1+etch2.

For the unstable distribution (sid), these problems have been fixed in version 3.1.7-1.

We recommend that you upgrade your pdns-recursor package.

Fixed in:

Debian GNU/Linux 4.0 (etch)

Source:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2.dsc
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4.orig.tar.gz
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2.diff.gz
Alpha:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2_alpha.deb
AMD64:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2_amd64.deb
Intel IA-32:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2_i386.deb
Intel IA-64:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2_ia64.deb
PowerPC:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2_powerpc.deb
IBM S/390:
http://security.debian.org/pool/updates/main/p/pdns-recursor/pdns-recursor_3.1.4-1+etch2_s390.deb

MD5 checksums of the listed files are available in the original advisory.