Stored cross-site scripting in FortiOS - CVE-2019-6697
Published: November 25, 2019 / Updated: November 26, 2019
Vulnerability identifier: #VU22967
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2019-6697
CWE-ID: CWE-79
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the hostname parameter of a DHCP packet under DHCP monitor page. An attacker in the local network can send a specially crafted DHCP packet to the affected system and execute arbitrary HTML and script code in administrator'r browser.
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.
Affected software
FortiOS
How to mitigate CVE-2019-6697
Install updates from vendor's website.
FortiOS - addressed in versions 6.0.7, 6.2.2