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CVE-2022-27491

HIGHCVSS 7.5/10EPSS 1.22%

Last modified

CVE-2022-27491 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A improper verification of source of a communication channel in Fortinet FortiOS with IPS engine version 7.201 through 7.214, 7.001 through 7.113, 6.001 through 6.121, 5.001 through 5.258 and before 4.086 allows a remote and unauthenticated attacker to trigger the sending of "blocked page" HTML data to an arbitrary victim via crafted TCP requests, potentially flooding the victim.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

A improper verification of source of a communication channel in Fortinet FortiOS with IPS engine version 7.201 through 7.214, 7.001 through 7.113, 6.001 through 6.121, 5.001 through 5.258 and before 4.086 allows a remote and unauthenticated attacker to trigger the sending of "blocked page" HTML data to an arbitrary victim via crafted TCP requests, potentially flooding the victim.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.22%

64.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
FortinetFortios>= 6.0.0, <= 6.0.14
FortinetFortios>= 6.2.0, < 6.2.11
FortinetFortios>= 6.4.0, < 6.4.9
FortinetFortios>= 7.0.0, < 7.0.6
FortinetFortios7.2.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-27491?
A improper verification of source of a communication channel in Fortinet FortiOS with IPS engine version 7.201 through 7.214, 7.001 through 7.113, 6.001 through 6.121, 5.001 through 5.258 and before 4.086 allows a remote and unauthenticated attacker to trigger the sending of "blocked page" HTML data to an arbitrary victim via crafted TCP requests, potentially flooding the victim.
How severe is CVE-2022-27491?
CVE-2022-27491 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.
How do I fix CVE-2022-27491?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-27491?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST