Vulnerability Development mailing list archives
Re: DoS Alcatel ADSL Modem Speed Touch Home
From: "Nikolaou, Dinos" <dreamer () DARKNESS GR>
Date: Fri, 23 Feb 2001 19:23:05 +0200
Confirmed, And at my adsl alcatel modem. Regards Nick Krassas On Sat, 24 Feb 2001, Cyber Hunter wrote:
I am using ADSL too , with NT 4.0 , but without any firewall system or nat , and the same problem happen with me , I thought that was a problem with WinNT , so I reinstalled it , but now I can see that others have the same problem .For me , the crash happen when I do a syn scan , from inside or outside. Of course that ADSL have a DoS already relatted , but for Xnix platform ( a PPPoE DoS ) , not NT. ----- Original Message ----- From: Ed Rolison <ed.rolison () BYZANTIUM COM> To: <VULN-DEV () SECURITYFOCUS COM> Sent: Friday, February 23, 2001 6:03 AM Subject: Re: DoS Alcatel ADSL Modem Speed Touch HomeHi, While playing around with my new ADSL connection I found out that whenyouportscan the ADSL modem it crashes. I used NMAP and tried it locally -nmapping rfc1918 IP- and also fromoutsidenmapping through mine PPTP connection, in both cases after a while themodemcrashes, and the only thing I can do is reset the Modem. I tried to upgrade the firmware but the problem stays. I used KHDSAA 134 (988348) and KHDSAA 132 (986865)Is your ADSL NATing? If so, then if you scan from inside, then it opensNATconnections, and has to maintain an entry in a connection table. Do a portscan, and it has to maintain a LOT of NAT connections (one perport perhost) and this can rapidly cause memory exhaustion. Your router is not the only NAT device which exhibits this problem :) (I'm assuming stuff, based on your mail but the fact that you are usingRFC1918indicates that there is NAT in there somewhere :)) -- Ed Rolison Systems Admin ER706-RIPE ed () byzantium com
Current thread:
- DoS Alcatel ADSL Modem Speed Touch Home Gerrie (Feb 22)
- <Possible follow-ups>
- Re: DoS Alcatel ADSL Modem Speed Touch Home Ed Rolison (Feb 23)
- Re: DoS Alcatel ADSL Modem Speed Touch Home Cyber Hunter (Feb 23)
- Re: DoS Alcatel ADSL Modem Speed Touch Home Nikolaou, Dinos (Feb 23)
- Sniffer for ADSL Cyber Hunter (Feb 24)
- Re: Sniffer for ADSL Blue Boar (Feb 24)
- Re: Sniffer for ADSL Cyber Hunter (Feb 24)
- Re: Sniffer for ADSL Antti Hakulinen (Feb 24)
- Re: Sniffer for ADSL Ryan Yagatich (Feb 24)
- Re: DoS Alcatel ADSL Modem Speed Touch Home Cyber Hunter (Feb 23)