Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2022-27491 |
CWE-ID | CWE-940 |
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.
EUVDB-ID: #VU67032
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-2022-27491
CWE-ID:
CWE-940 - Improper Verification of Source of a Communication Channel
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper verification of the communication channel source when handling TCP connections. A remote attacker can force the device to send "blocked page" HTML data to an arbitrary victim via specially crafted TCP requests and perform TCP Middlebox Reflection attack.
Successful exploitation of the vulnerability requires that at least one firewall policy has inspection mode set to flow-based (default) and at least one Security Profile is enabled (e.g. Web Filter, AntiVirus, IPS, DLP, Application Control, SSL, File filter).
MitigationInstall updates from vendor's website.
Vulnerable software versionsFortiOS: 6.0.0 - 7.2.0
External linkshttp://fortiguard.fortinet.com/psirt/FG-IR-22-073
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.