SB2017120107 - Multiple vulnerabilities in FortiGate SSL VPN web portal
Published: December 1, 2017 Updated: May 27, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Cross-site scripting (XSS) (CVE-ID: CVE-2017-14186)
Vulnerability allows a remote authenticated attacker to perform XSS attacks.
The vulnerability is caused by an input validation error in Fortinet FortiOS 5.6.0 to 5.6.2, 5.4.0 to 5.4.6, 5.2.0 to 5.2.12, 5.0 and below versions under SSL VPN web portal when processing the login "redir" parameter. A remote authenticated attacker can trick the victim to follow a specially specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
2) Open redirect (CVE-ID: CVE-2017-14186)
Vulnerability allows a remote authenticated attacker to perform open redirection attacks.
The vulnerability is caused by an input validation error in Fortinet FortiOS 5.6.0 to 5.6.2, 5.4.0 to 5.4.6, 5.2.0 to 5.2.12, 5.0 and below versions under SSL VPN web portal when processing the login "redir" parameter. A remote attacker can redirect users to an external website.
Remediation
Install update from vendor's website.