Cross-site scripting in Fortinet FortiOS

Published: 2017-11-08 10:41:37
Severity Low
Patch available YES
Number of vulnerabilities 1
CVSSv2 3.2 (AV:N/AC:M/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
CVSSv3 5.2 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE ID CVE-2017-7739
CWE ID CWE-79
Exploitation vector Network
Public exploit Not available
Vulnerable software FortiOS
Vulnerable software versions FortiOS 5.2.11
FortiOS 5.2.4
FortiOS 5.2.10
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Vendor URL Fortinet, Inc
Advisory type Public

Security Advisory

1) Cross-site scripting

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists in the web proxy disclaimer response pages due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in 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.

Remediation

Update to version 5.2.12, 5.4.6, 5.6.1.

External links

http://fortiguard.com/psirt/FG-IR-17-168

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