CVE-2022-27491: TCP Middlebox Reflection
First published: Tue Sep 06 2022(Updated: )
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.
Credit: psirt@fortinet.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Fortinet FortiOS IPS Engine | >=6.0.0<=6.0.14 | |
| Fortinet FortiOS IPS Engine | >=6.2.0<6.2.11 | |
| Fortinet FortiOS IPS Engine | >=6.4.0<6.4.9 | |
| Fortinet FortiOS IPS Engine | >=7.0.0<7.0.6 | |
| Fortinet FortiOS IPS Engine | =7.2.0 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-27491?
CVE-2022-27491 is rated as a high severity vulnerability due to the potential for remote and unauthenticated exploitation.
How do I fix CVE-2022-27491?
To mitigate CVE-2022-27491, upgrade Fortinet FortiOS to a version above 7.2.0 or apply the relevant patches provided by Fortinet.
What are the affected versions for CVE-2022-27491?
CVE-2022-27491 affects FortiOS versions from 5.001 to 7.214, with specific exceptions depending on minor versioning.
Who is likely to be targeted by CVE-2022-27491?
CVE-2022-27491 poses a risk to organizations using vulnerable versions of FortiOS, making them targets for remote attackers.
What types of attacks can be executed due to CVE-2022-27491?
Exploitation of CVE-2022-27491 allows attackers to perform action assertions through improperly verified communication channels.
- agent/type
- agent/softwarecombine
- agent/author
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/fortiguard-psirt-latest
- source/FortiGuard
- alias/CVE-2022-27491
- collector/fortiguard-psirt
- agent/severity
- agent/references
- agent/title
- agent/first-publish-date
- agent/event
- agent/description
- agent/trending
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/fortinet
- canonical/fortinet fortios ips engine
- version/fortinet fortios ips engine/6.0.0
- version/fortinet fortios ips engine/6.0.14
- version/fortinet fortios ips engine/6.2.0
- version/fortinet fortios ips engine/6.4.0
- version/fortinet fortios ips engine/7.0.0
- version/fortinet fortios ips engine/7.2.0