CVE-2023-42789: Out-of-bounds Write in captive portal
First published: Tue Mar 12 2024(Updated: )
A out-of-bounds write in Fortinet FortiOS 7.4.0 through 7.4.1, 7.2.0 through 7.2.5, 7.0.0 through 7.0.12, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, FortiProxy 7.4.0, 7.2.0 through 7.2.6, 7.0.0 through 7.0.12, 2.0.0 through 2.0.13 allows attacker to execute unauthorized code or commands via specially crafted HTTP requests.
Credit: psirt@fortinet.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Fortinet FortiOS IPS Engine | >=7.4.0<=7.4.1 | |
| Fortinet FortiOS IPS Engine | >=7.2.0<=7.2.5 | |
| Fortinet FortiOS IPS Engine | >=7.0.0<=7.0.12 | |
| Fortinet FortiOS IPS Engine | >=6.4.0<=6.4.14 | |
| Fortinet FortiOS IPS Engine | >=6.2.0<=6.2.15 | |
| Fortinet FortiProxy | =. | |
| Fortinet FortiProxy | >=7.2.0<=7.2.6 | |
| Fortinet FortiProxy | >=7.0.0<=7.0.12 | |
| Fortinet FortiProxy | >=2.0.0<=2.0.13 | |
| Fortinet FortiSASE | =3 | |
| Fortinet FortiProxy | >=2.0.0<=2.0.13 | |
| Fortinet FortiProxy | >=7.0.0<=7.0.12 | |
| Fortinet FortiProxy | >=7.2.0<=7.2.6 | |
| Fortinet FortiProxy | =7.4.0 | |
| Fortinet FortiOS IPS Engine | >=6.2.0<=6.2.15 | |
| Fortinet FortiOS IPS Engine | >=6.4.0<=6.4.14 | |
| Fortinet FortiOS IPS Engine | >=7.0.0<=7.0.12 | |
| Fortinet FortiOS IPS Engine | >=7.2.0<=7.2.5 | |
| Fortinet FortiOS IPS Engine | =7.4.0 | |
| Fortinet FortiOS IPS Engine | =7.4.1 |
Remedy
Please upgrade to FortiOS version 7.4.2 or above Please upgrade to FortiOS version 7.2.6 or above Please upgrade to FortiOS version 7.0.13 or above Please upgrade to FortiOS version 6.4.15 or above Please upgrade to FortiOS version 6.2.16 or above Please upgrade to FortiProxy version 7.4.1 or above Please upgrade to FortiProxy version 7.2.7 or above Please upgrade to FortiProxy version 7.0.13 or above Please upgrade to FortiProxy version 2.0.14 or above Fortinet in Q3/23 has remediated this issue in FortiSASE version 23.3.b and hence the customers need not perform any action.
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Reference Links
- https://fortiguard.com/psirt/FG-IR-23-328
- https://www.fortiguard.com/psirt/cvrf/FG-IR-23-328
- https://www.fortiguard.com/psirt/FG-IR-23-328
- https://www.theregister.com/2024/03/13/patch_tuesday_march_2024/
- https://www.bleepingcomputer.com/news/security/fortinet-warns-of-critical-rce-bug-in-endpoint-management-software/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2023-42789?
CVE-2023-42789 is considered critical due to its potential to allow unauthorized code execution.
How do I fix CVE-2023-42789?
To remediate CVE-2023-42789, upgrade FortiOS to version 7.4.2 or later, or FortiProxy to version 7.4.1 or later.
Which versions are affected by CVE-2023-42789?
CVE-2023-42789 affects FortiOS versions 6.2.0 to 7.4.1 and FortiProxy versions 2.0.0 to 7.4.0.
Can CVE-2023-42789 lead to data breaches?
Yes, exploitation of CVE-2023-42789 can lead to severe security breaches and unauthorized access to sensitive information.
Are there any workarounds for CVE-2023-42789?
There are no effective workarounds for CVE-2023-42789; updating to the patched versions is the recommended action.
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