The Fortinet FortiWAN (Ascernlink) network load balancer appliance contains multiple vulnerabilities.
According to the reporter, the Fortinet FortiWAN network load balancer appliance contains the following vulnerabilities.
CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') - CVE-2016-4965
diagnosis_control.php page is vulnerable to command injection via the
"graph" GET parameter. A non-administrative authenticated attacker having access privileges to the
nslookup functionality can inject arbitrary operating system commands and execute them in the context of the root user.
CWE-302: Authentication Bypass by Assumed-Immutable Data - CVE-2016-4966
diagnosis_control.php page has a
tcpdump function, that can capture FortiWAN data packets and download captured packets to local host for analysis and debug. A non-administrative authenticated attacker having access privileges to change the HTTP Get param “
UserName” to “Administrator” to download a PCAP file of all captured packets from the FortinWAN device since the
tcpdump function was activated.
CWE-200: Information Exposure - CVE-2016-4967
An authenticated but low privileged user may obtain a backup of the device configuration by visiting the URL
/script/cfg_show.php of the FortiWAN appliance, or a PCAP of
tcpdump data by visiting
CWE-200: Information Exposure - CVE-2016-4968
An authenticated but low privileged user may perform a GET request of the
/linkreport/tmp/admin_global page of the FortiWAN appliance, and obtain administrator login cookie.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') - CVE-2016-4969
/script/statistics/getconn.php file's IP parameter is vulnerable to cross-site scripting.
The CVSS score below is based on CVE-2016-4965.
An authenticated but low-privileged (non-administrator) account may be able to execute OS commands in the root context, capture network traffic through the FortiWAN device, obtain appliance system configuration, or conduct cross-site scripting attacks against administrator users.
Apply an update
Fortinet has released FortiWAN 4.2.5 which addresses all issues. For more information, please see the changelog. Affected users are encouraged to update as soon as possible.
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Notified: July 14, 2016 Updated: September 09, 2016
Statement Date: September 09, 2016
No statement is currently available from the vendor regarding this vulnerability.
FortiWAN version 4.2.5 addresses all vulnerabilities listed in VU#724487. Please see the release notes below for more information.
Group | Score | Vector
Base | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C
Temporal | 8 | E:POC/RL:U/RC:UR
Environmental | 6.0 | CDP:ND/TD:M/CR:ND/IR:ND/AR:ND
Thanks to Virgoteam (Fan-Syun Shih, Kun-Xian Lin, and Yu-Chi Ding) for reporting these vulnerabilities.
This document was written by Garret Wassermann.
CVE IDs: | CVE-2016-4965, CVE-2016-4966, CVE-2016-4967, CVE-2016-4968, CVE-2016-4969
Date Public: | 2016-09-06
Date First Published: | 2016-09-06
Date Last Updated: | 2016-09-09 17:12 UTC
Document Revision: | 28