CVE-2023-42789

Description

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.

Remediation

Solution:

  • 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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 23.64% Top 5%
Vendor Advisory fortiguard.com
Affected: Fortinet FortiOS
Affected: Fortinet FortiPAM
Affected: Fortinet FortiProxy
Published at:
Updated at:

References

Link Tags
https://fortiguard.com/psirt/FG-IR-23-328 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-42789?
CVE-2023-42789 has been scored as a critical severity vulnerability.
How to fix CVE-2023-42789?
To fix CVE-2023-42789: 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.
Is CVE-2023-42789 being actively exploited in the wild?
It is possible that CVE-2023-42789 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~24% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-42789?
CVE-2023-42789 affects Fortinet FortiOS, Fortinet FortiPAM, Fortinet FortiProxy.
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