Executive Summary

Summary
Title Zyxel P660 series modem/router denial of service vulnerability
Informations
Name VU#893726 First vendor Publication 2014-04-01
Vendor VU-CERT Last vendor Modification 2014-04-01
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
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Detail

Vulnerability Note VU#893726

Zyxel P660 series modem/router denial of service vulnerability

Original Release date: 01 Apr 2014 | Last revised: 01 Apr 2014

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 (Learn More)

VendorStatusDate NotifiedDate Updated
ZyXELAffected17 Jun 201331 Jul 2013
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

GroupScoreVector
Base7.1AV:N/AC:M/Au:N/C:N/I:N/A:C
Temporal5.4E:U/RL:U/RC:UC
Environmental4.1CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

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

Credit

Thanks to Alex French for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

  • CVE IDs:CVE-2013-3588
  • Date Public:06 Aug 2013
  • Date First Published:01 Apr 2014
  • Date Last Updated:01 Apr 2014
  • Document Revision:11

Feedback

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Original Source

Url : http://www.kb.cert.org/vuls/id/893726

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 1
Hardware 2
Hardware 1
Hardware 2
Hardware 2
Hardware 1
Hardware 2

Alert History

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0
1
2
Date Informations
2014-04-02 21:26:04
  • Multiple Updates
2014-04-02 13:26:48
  • Multiple Updates
2014-04-01 17:24:39
  • First insertion