Executive Summary

Summary
Title Watchguard Extensible Threat Management (XTM) appliance version 11.7.4 contains a buffer overflow vulnerability
Informations
Name VU#233990 First vendor Publication 2013-10-18
Vendor VU-CERT Last vendor Modification 2013-10-18
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
 
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Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#233990

Watchguard Extensible Threat Management (XTM) appliance version 11.7.4 contains a buffer overflow vulnerability

Original Release date: 18 Oct 2013 | Last revised: 18 Oct 2013

Overview

Watchguard Extensible Threat Management (XTM) version 11.7.4 and possibly earlier versions contain a buffer overflow vulnerability (CWE-121).

Description

CWE-121: Stack-based Buffer Overflow

Watchguard Extensible Threat Management (XTM) version 11.7.4 and possibly earlier versions contain a buffer overflow vulnerability when reading large cookie requests. Remote administration is enabled by default on TCP/8080 for the virtual appliances (XTMv). The physical XTM appliances do not have this feature enabled by default.

WGagent is one of the processes running on the XTM appliance, which is responsible for parsing web cookies sent to the appliance’s web management interface. By creating a maliciously crafted cookie that contains an arbitrarily large sessionid value and connecting to the XTM appliance’s web management interface, an unauthenticated attacker can exploit this vulnerability to execute code on the appliance.

The WGagent process runs with low privileges and from a chroot jail, but it does have enough privilege to access the configuration file and change passwords.

Impact

A remote unauthenticated attacker may be able to cause a denial of service, or execute arbitrary code on the appliance.

Solution

Apply an Update

Users are advised to apply the Watchguard XTM version 11.8 patch. If applying the patch is not possible, please consider the following workaround.

Restrict access to the Watchguard XTM interface

Restrict access to the Watchguard XTM web interface to trusted networks. If possible, configure management and transit networks for separate VLANs, or restrict access to the device using IP access lists.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Watchguard Technologies, Inc.Affected23 Sep 201316 Oct 2013
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

GroupScoreVector
Base9.3AV:N/AC:M/Au:N/C:C/I:C/A:C
Temporal7.3E:POC/RL:OF/RC:C
Environmental1.8CDP:ND/TD:L/CR:ND/IR:ND/AR:ND

References

  • http://cwe.mitre.org/data/definitions/121.html
  • http://www.watchguard.com/products/xtm-main.asp
  • http://www.watchguard.com/support/index.asp
  • http://watchguardsecuritycenter.com/2013/10/17/xtm-11-8-secfixes/
  • http://watchguardsecuritycenter.com/2013/10/17/watchguard-dimension-and-fireware
  • -xtm-11-8/

Credit

Thanks to Jerome Nokin (Research and Discovery)and Thierry Zoller (Coordination)from Verizon Enterprise Solutions (GCIS Threat and Vulnerability Management) for reporting this vulnerability.

This document was written by Adam Rauf.

Other Information

  • CVE IDs:CVE-2013-6021
  • Date Public:18 Oct 2013
  • Date First Published:18 Oct 2013
  • Date Last Updated:18 Oct 2013
  • Document Revision:20

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/233990

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 19

ExploitDB Exploits

id Description
2013-10-29 WatchGuard Firewall XTM 11.7.4u1 - Remote Buffer Overflow

Alert History

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0
1
2
3
Date Informations
2013-11-11 13:36:16
  • Multiple Updates
2013-10-21 21:27:36
  • Multiple Updates
2013-10-19 17:22:19
  • Multiple Updates
2013-10-19 00:19:04
  • First insertion