Debian: DSA-1544-2 Critical: Pdns-Recursor Remote Attack
debian
July 16, 2008
Thomas Biege discovered that the upstream fix for the weak random number
generator released in DSA-1544-1 was incomplete: Source port
randomization did still not use difficult...
Topics Covered
Summary
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)
In the light of recent DNS-related developments (documented in DSAs
1603, 1604, 1605), we recommend that this update is installed as an
additional safety measure. (The lack of source port randomization was
addressed in the 3.1.6 upstream version.)
In addition, this update incorporates the changed IP address of
L.ROOT-SERVERS.NET.
For the stable distribution (etch), this problem has been fixed in
version 3.1.4-1+etch2.
For the unstable distribution (sid), this problem has been fixed in
version 3.1.7-1.
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 ...
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