Vulnerability identifier: #VU68099

Vulnerability 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-2022-29055

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

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

The vulnerability exists due to a NULL pointer dereference error within the SSL VPN portal. A remote attacker can send a specially crafted HTTP GET request to the system and crash the sslvpn daemon.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 7.2.0 - 7.2.1, 7.0.0 - 7.0.6, 6.4.2 - 6.4.9, 6.0.8 - 6.0.14, 6.2.6 - 6.2.10

FortiProxy: 7.2.0, 7.0.0 - 7.0.6, 2.0.0 - 2.0.9

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External links
http://fortiguard.fortinet.com/psirt/FG-IR-22-086

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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.