QID 44089

Date Published: 2023-07-14

QID 44089: FortiOS - Traffic Bypass Vulnerability (FG-IR-20-172)

FortiOS is vulnerable to a traffic bypass vulnerability.

Affected Versions:
FortiOS versions 6.4.2 and below
FortiOS versions 6.2.5 and below

QID Detection Logic (Authenticated):
Detection checks for vulnerable version of FortiOS.

NOTE: As we do not check for the workaround, kept the QID as Practice.

Vulnerable versions of FortiOS may allow malicious traffic to bypass the transparent proxy policy when traffic other than HTTP/S (eg: SSH traffic, etc...) traverses the FortiOS on port 80/443 that would lack a valid HTTP header.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 4.3 severity.

Solution

Fortinet has released patch addressing the vulnerability. For more information please refer to FG-IR-20-172Workaround:
Workaround is to disable tunnel-non-http and block unsupported-ssl.

Vendor References

FG-IR-20-172 - www.fortiguard.com/psirt/FG-IR-20-172

CVEs related to QID 44089

CVE-2020-15938 |

Software Advisories

Advisory ID	Software	Component	Link
FG-IR-20-172			www.fortiguard.com/psirt/FG-IR-20-172

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