CVE-2023-22640

Description

A out-of-bounds write in Fortinet FortiOS version 7.2.0 through 7.2.3, FortiOS version 7.0.0 through 7.0.10, FortiOS version 6.4.0 through 6.4.11, FortiOS version 6.2.0 through 6.2.13, FortiOS all versions 6.0, FortiProxy version 7.2.0 through 7.2.1, FortiProxy version 7.0.0 through 7.0.7, FortiProxy all versions 2.0, FortiProxy all versions 1.2, FortiProxy all versions 1.1, FortiProxy all versions 1.0 allows an authenticated attacker to execute unauthorized code or commands via specifically crafted requests.

Remediation

Solution:

  • Please upgrade to FortiOS version 7.4.0 or above Please upgrade to FortiOS version 7.2.4 or above Please upgrade to FortiOS version 7.0.11 or above Please upgrade to FortiOS version 6.4.12 or above Please upgrade to FortiOS version 6.2.14 or above Please upgrade to FortiProxy version 7.2.2 or above Please upgrade to FortiProxy version 7.0.8 or above   Workaround:   Disable "Host Check", "Restrict to Specific OS Versions" and "MAC address host checking" in sslvpn portal configuration. For example for "full-access" sslvpn portal:   config vpn ssl web portal edit "full-access" set os-check disable set host-check none set mac-addr-check disable end

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.36%
Vendor Advisory fortiguard.com
Affected: Fortinet FortiOS
Affected: Fortinet FortiProxy
Published at:
Updated at:

References

Link Tags
https://fortiguard.com/psirt/FG-IR-22-475 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-22640?
CVE-2023-22640 has been scored as a high severity vulnerability.
How to fix CVE-2023-22640?
To fix CVE-2023-22640: Please upgrade to FortiOS version 7.4.0 or above Please upgrade to FortiOS version 7.2.4 or above Please upgrade to FortiOS version 7.0.11 or above Please upgrade to FortiOS version 6.4.12 or above Please upgrade to FortiOS version 6.2.14 or above Please upgrade to FortiProxy version 7.2.2 or above Please upgrade to FortiProxy version 7.0.8 or above   Workaround:   Disable "Host Check", "Restrict to Specific OS Versions" and "MAC address host checking" in sslvpn portal configuration. For example for "full-access" sslvpn portal:   config vpn ssl web portal edit "full-access" set os-check disable set host-check none set mac-addr-check disable end
Is CVE-2023-22640 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-22640 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-22640?
CVE-2023-22640 affects Fortinet FortiOS, Fortinet FortiProxy.
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