Denial of service in Fortinet FortiOS



Published: 2019-11-28
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-15705
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		FortiOS
Operating systems & Components / Operating system

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU23072

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15705

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the SSL VPN portal. A remote attacker can send a specially crafted POST request and crash the SSL VPN service.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiOS: 2.36 - 6.2.1

External links

http://fortiguard.com/advisory/FG-IR-19-236


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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



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