Zyxel P660 series modem/router denial of service vulnerability

2014-04-01T00:00:00
ID VU:893726
Type cert
Reporter CERT
Modified 2014-04-01T14:43:00

Description

Overview

Zyxel P660 series modem/router contains a denial of service vulnerability when parsing a high volume of SYN packets on the web management interface.

Description

It has been reported that Zyxel P660 series modem/router (and possibly other models which share the same core firmware) fail to parse a high volume of SYN packets on the web management interface correctly causing the device to reboot. By default, the device runs a web management interface on port tcp/80 which is accessible remotely (LAN and WAN sides).


Impact

An unauthenticated attacker can cause the device to reboot and become unavailable by sending a stream of SYN packets to the device's web management interface.


Solution

We are currently unaware of a practical solution to this problem.


Restrict Network Access

As a general good security practice, only allow connections from trusted hosts and networks if possible. Restricting access would prevent an attacker from connecting to the service from a blocked network location.


Vendor Information

893726

Filter by status: All Affected Not Affected Unknown

Filter by content: __ Vendor has issued information

__ Sort by: Status Alphabetical

Expand all

Affected Unknown __ Unaffected

Javascript is disabled. Click here to view vendors.

__ ZyXEL

Notified: June 17, 2013 Updated: July 31, 2013

Status

__ Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | 7.1 | AV:N/AC:M/Au:N/C:N/I:N/A:C
Temporal | 5.4 | E:U/RL:U/RC:UC
Environmental | 4.1 | CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

<http://www.zyxel.com/products_services/p_660h_series.shtml?t=p>

Acknowledgements

Thanks to Alex French for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs: | CVE-2013-3588
---|---
Date Public: | 2013-08-06
Date First Published: | 2014-04-01
Date Last Updated: | 2014-04-01 14:43 UTC
Document Revision: | 11