VDB-135957 · CVE-2019-5586 · FG-IR-19-034

Fortinet FortiOS up to 6.0.4 SSL VPN Web Portal param Reflected cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Fortinet FortiOS up to 6.0.4 and classified as problematic. This affects an unknown function of the component SSL VPN Web Portal. Performing a manipulation of the argument param as part of HTTP Requests results in cross site scripting (Reflected). This vulnerability is reported as CVE-2019-5586. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Fortinet FortiOS up to 6.0.4 (Firewall Software). This affects an unknown part of the component SSL VPN Web Portal. The manipulation of the argument param as part of a HTTP Requests leads to a cross site scripting vulnerability (Reflected). CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

A reflected Cross-Site-Scripting (XSS) vulnerability in Fortinet FortiOS 5.2.0 to 6.0.4 under SSL VPN web portal may allow an attacker to execute unauthorized malicious script code via the "param" parameter of the error process HTTP requests.

The weakness was disclosed 05/24/2019 as FG-IR-19-034 as confirmed advisory (Website). The advisory is shared at fortiguard.com. This vulnerability is uniquely identified as CVE-2019-5586 since 01/07/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 6.0.5 or 6.2.0 eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting config vpn ssl settings; unset source-interface; end. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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Productinfo

Type

Firewall Software

Vendor

Fortinet

Name

FortiOS

Version

License

commercial

Website

Vendor: https://www.fortinet.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Reflected
Class: Cross site scripting / Reflected
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: FortiOS 6.0.5/6.2.0
Config: config vpn ssl settings; unset source-interface; end

Timelineinfo

01/07/2019 🔍
05/24/2019 +137 days 🔍
05/24/2019 +0 days 🔍
06/05/2019 +12 days 🔍
09/28/2023 +1576 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-19-034
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-5586 (🔍)
GCVE (CVE): GCVE-0-2019-5586
GCVE (VulDB): GCVE-100-135957
SecurityFocus: 108610

See also: 🔍

Entryinfo

Created: 06/05/2019 09:19
Updated: 09/28/2023 08:12
Changes: 06/05/2019 09:19 (66), 06/19/2020 12:17 (1), 09/28/2023 08:12 (4)
Complete: 🔍
Cache ID: 216::103

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