[Dnsmasq-discuss] CNAME buffer overflow?

[Philip Le Riche]

Thanks for your help Simon. For the record (for other readers of the 
forum), my router gives a reply status of REFUSED to the dig chaos txt 
version.bind, strongly indicating that it isn't dnsmasq in there. I'll 
go and search elsewhere.

Regards - Philip

Simon Kelley wrote:
> A couple more data points:
>
> dig abcdefghijklm.dns.grc.com
>
> (query taken from Philip's packet capture) works fine with the lastest 
> dnsmasq code, and with 2.16, the release before the putative fix.
>
>
> srk at spike:~$ dig abcdefghijklm.dns.grc.com
>
> ; <<>> DiG 9.3.2-P1 <<>> abcdefghijklm.dns.grc.com
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45378
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;abcdefghijklm.dns.grc.com.     IN      A
>
> ;; ANSWER SECTION:
> abcdefghijklm.dns.grc.com. 60   IN      CNAME 
> a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a. 
> a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a. 
>
> a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a. 
>               a.m0zhev0yf1pjl.dns.grc.com.
> a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a. 
>
> a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a. 
>
> a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.m0zhev0yf1pjl.dns.grc.com. 60 IN A 
> 4.79.142.19               3
>
> ;; Query time: 301 msec
> ;; SERVER: 127.0.0.1#53(127.0.0.1)
> ;; WHEN: Sun Sep 14 22:26:22 2008
> ;; MSG SIZE  rcvd: 281
>
> srk at spike:~$ dig chaos txt version.bind
>
> ; <<>> DiG 9.3.2-P1 <<>> @central chaos txt version.bind
> ; (1 server found)
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47301
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;version.bind.                  CH      TXT
>
> ;; ANSWER SECTION:
> version.bind.           0       CH      TXT     "dnsmasq-2.46test9"
>
> ;; Query time: 0 msec
> ;; SERVER: 192.168.0.4#53(192.168.0.4)
> ;; WHEN: Sun Sep 14 22:27:29 2008
> ;; MSG SIZE  rcvd: 60
>
>
> Cheers,
>
> Simon.
>


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