Fortinet has released updates that address critical bugs.
We recommend all FortiGate systems be upgraded to the latest released version as soon as possible.
FortiOS – Format String Bug in fgfmd (FG-IR-24-029)
Summary
A use of externally-controlled format string vulnerability [CWE-134] in FortiOS fgfmd daemon may allow a remote unauthenticated attacker to execute arbitrary code or commands via specially crafted requests.
| Version | Affected | Solution |
|---|---|---|
| FortiOS 7.4 | 7.4.0 through 7.4.2 | Upgrade to 7.4.3 or above |
| FortiOS 7.2 | 7.2.0 through 7.2.6 | Upgrade to 7.2.7 or above |
| FortiOS 7.0 | 7.0.0 through 7.0.13 | Upgrade to 7.0.14 or above |
Follow the recommended upgrade path using our tool at: https://docs.fortinet.com/upgrade-tool
FortiOS 6.x is not affected.
More details here: https://www.fortiguard.com/psirt/FG-IR-24-029
FortiOS – Out-of-bound Write in sslvpnd (FG-IR-24-015)
Summary
A out-of-bounds write vulnerability [CWE-787] in FortiOS may allow a remote unauthenticated attacker to execute arbitrary code or command via specially crafted HTTP requests.
Workaround : disable SSL VPN (disable webmode is NOT a valid workaround)
Note: This is potentially being exploited in the wild.
| Version | Affected | Solution |
|---|---|---|
| FortiOS 7.6 | Not affected | Not Applicable |
| FortiOS 7.4 | 7.4.0 through 7.4.2 | Upgrade to 7.4.3 or above |
| FortiOS 7.2 | 7.2.0 through 7.2.6 | Upgrade to 7.2.7 or above |
| FortiOS 7.0 | 7.0.0 through 7.0.13 | Upgrade to 7.0.14 or above |
| FortiOS 6.4 | 6.4.0 through 6.4.14 | Upgrade to 6.4.15 or above |
| FortiOS 6.2 | 6.2.0 through 6.2.15 | Upgrade to 6.2.16 or above |
| FortiOS 6.0 | 6.0 all versions | Migrate to a fixed release |
Follow the recommended upgrade path using our tool at: https://docs.fortinet.com/upgrade-tool
FortiSASE: Issue remediated Q1/24
More details here: https://www.fortiguard.com/psirt/FG-IR-24-015
You may read about the importance of patching critical updates in a timely fashion and analysis of prior past vulnerabilities via this blog:
The Importance of Patching: An Analysis of the Exploitation of N-Day Vulnerabilities | Fortinet Blog
If you have FortiGate’s which are running FOS 7.2.1 or later and are not managed by a centralized update system, you may configure automatic firmware updates:
Enable automatic firmware updates 7.2.1 | FortiGate / FortiOS 7.2.0 | Fortinet Document Library
Is the patched firmware available?
Yes, the following FortiGate/FOS patched versions are 6.2.16, 6.4.15, 7.0.14, 7.2.7, and 7.4.3.
These images can be found in the download section of support or through the update system on the FortiGate.
https://support.fortinet.com/Download/FirmwareImages.aspx
Are you able to provide more information on the vulnerability?
The public PSIRT is the only detail made available at this time.
Is there a workaround as opposed to upgrade?
For FG-IR-24-029, there is no workaround, thus an upgrade is required.
For FG-IR-24-015, yes. “Workaround : disable SSL VPN (disable webmode is NOT a valid workaround)”
