In many cases DNS queries will contain a mixed-case domain name as a mean of
additional security. The DNS server included fails to parse mixed-case domain
names due a case-sensitive comparison.
Example: nslookup yourdomain.com 167.206.245.135
Line 92 & 93 of dns.c seem to be the fail point
fqdn_offset = strstr(question_domain,fqdn);
if(fqdn_offset == NULL || (fqdn_offset && strlen(fqdn_offset) != strlen(fqdn))){
***References***
-Increased DNS Forgery Resistance Through 0x20-Bit Encoding
http://webcache.googleusercontent.com/search?q=cache:_LzckuNoOSYJ:courses.isi.jh
u.edu/netsec/papers/increased_dns_resistance.pdf
Original issue reported on code.google.com by
t35...@gmail.comon 12 Sep 2014 at 5:19