Log injection in FortiWeb

1) Improper Output Neutralization for Logs

EUVDB-ID: #VU84529

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-46713

CWE-ID: CWE-117 - Improper Output Neutralization for Logs

Exploit availability: No

Description

The vulnerability allows a remote attacker to alter log files.

The vulnerability exists due to improper input validation in FortiWeb Traffic Log component. A remote attacker can send specially crafted HTTP request and add arbitrary records into the log files.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Fortinet FortiWeb: 6.2.0 - 7.4.0

CPE2.3

• cpe:2.3:a:fortinet:fortinet_fortiweb:6.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:6.3.23:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:7.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:7.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:7.4.0:*:*:*:*:*:*:*

External links

https://fortiguard.com/psirt/FG-IR-23-256

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.