ZyXEL Prestige 642R malformed TCP packet denial of service
|zyxel-tcp-packet-dos (9372)||Medium Risk|
The ZyXEL Prestige 642R router is vulnerable to a denial of service attack. A remote attacker can send a TCP packet with the SYN and ACK flags set to block services on the router. If a TCP packet with the SYN and FIN flags are set, services on the router would become inaccessible for a short period of time.
Note: Services affected by this vulnerability include Telnet, FTP, and DHCP.
Denial of Service
No remedy available as of December 1, 2013.
- BugTraq Mailing List, Mon Jun 17 2002 - 07:59:11 CDT: ZyXEL 642R(-11) AJ.6 SYN-ACK, SYN-FIN DoS.
- BugTraq Mailing List, Mon Jun 17 2002 - 12:47:27 CDT: Re: ZyXEL 642R(-11) AJ.6 SYN-ACK, SYN-FIN DoS -- 643R testing.
- BugTraq Mailing List, Mon Jun 17 2002 - 13:09:41 CDT: Follow: ZyXEL 642R-11 AJ.6 service DoS -- additional informations.
- BID-5034: Zyxel Prestige 642R Malformed Packet Denial Of Service Vulnerability
- CVE-2002-1071: ZyXEL Prestige 642R allows remote attackers to cause a denial of service in the Telnet, FTP, and DHCP services (crash) via a TCP packet with both the SYN and ACK flags set.
- OSVDB ID: 9982: ZyXEL Prestige 642R Malformed TCP Packet DoS
- ZyXEL Prestige 342R
Jun 17, 2002
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