VDB-91399 · CVE-2016-4573 · BID 92450

Fortinet FortiSwitch FSW up to 3.4.0 Managed Mode access control

CVSS Meta Temp Score
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CTI Interest Score
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8.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Fortinet FortiSwitch FSW up to 3.4.0. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Managed Mode. This manipulation causes access control. The identification of this vulnerability is CVE-2016-4573. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Fortinet FortiSwitch FSW up to 3.4.0 and classified as critical. Affected by this vulnerability is an unknown function of the component Managed Mode. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Fortinet FortiSwitch FSW-108D-POE, FSW-124D, FSW-124D-POE, FSW-224D-POE, FSW-224D-FPOE, FSW-248D-POE, FSW-248D-FPOE, FSW-424D, FSW-424D-POE, FSW-424D-FPOE, FSW-448D, FSW-448D-POE, FSW-448D-FPOE, FSW-524D, FSW-524D-FPOE, FSW-548D, FSW-548D-FPOE, FSW-1024D, FSW-1048D, FSW-3032D, and FSW-R-112D-POE models, when in FortiLink managed mode and upgraded to 3.4.1, might allow remote attackers to bypass authentication and gain administrative access via an empty password for the rest_admin account.

The weakness was shared 09/09/2016 by Emma Ferguson as FortiSwitch rest_admin account exposed under certain conditions as confirmed advisory (Website). It is possible to read the advisory at themissinglink.com.au. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2016-4573 since 05/10/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. The advisory points out:

FortiSwitch 3.4.1 introduced a user account named "rest_admin" with super_admin privileges when the FortiSwitch is configured to be managed by a FortiGate device. The FortiSwitch needs to communicate with the FortiGate to generate a random password for the "rest_admin" account. However if the network connection between the FortiSwitch and FortiGate cannot be established when it is rebooted twice or downgraded to a FortiSwitch release prior to 3.4.1 then the rest_admin will be exposed with a null password.

A public exploit has been developed by Emma Ferguson and been published immediately after the advisory. It is possible to download the exploit at themissinglink.com.au. It is declared as proof-of-concept.

Upgrading to version 3.4.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92450†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.3

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Emma Ferguson
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: FortiSwitch FSW 3.4.1

Timelineinfo

05/10/2016 🔍
08/11/2016 +93 days 🔍
09/09/2016 +29 days 🔍
09/09/2016 +0 days 🔍
09/09/2016 +0 days 🔍
09/11/2016 +2 days 🔍
04/13/2019 +944 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FortiSwitch rest_admin account exposed under certain conditions
Researcher: Emma Ferguson
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-4573 (🔍)
GCVE (CVE): GCVE-0-2016-4573
GCVE (VulDB): GCVE-100-91399
SecurityFocus: 92450 - Fortinet FortiSwitch CVE-2016-4573 Security Bypass Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/11/2016 11:12
Updated: 04/13/2019 14:47
Changes: 09/11/2016 11:12 (61), 04/13/2019 14:47 (13)
Complete: 🔍
Cache ID: 216:72D:103

Be aware that VulDB is the high quality source for vulnerability data.

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