QID 43912

Date Published: 2022-10-18

QID 43912: FortiOS Heap-based Buffer Overflow Vulnerability (FG-IR-21-115)

A heap-based buffer overflow [CWE-122] in the firmware signature verification function of FortiOS may allow an attacker to execute arbitrary code via specially crafted installation images.

Affected Products:
FortiGate E-series and F-series models released in 2019 and later (specifically: 40F, 60F, 200F, 400E, 600E, 1100E, 1800F, 2200E, 2600F, 3300E, 3400E, 3500F, 3600E and 7121F) that are running the following versions of FortiOS:
FortiOS version 7.0.1 and below
FortiOS version 6.4.6 and below
FortiOS version 6.2.9 and below
FortiOS version 6.0.13 and below
FortiOS-6K7K version 6.4.2 and below
FortiOS-6K7K version 6.2.7 and below
FortiOS-6K7K version 6.0.10 and below

QID Detection Logic (Authenticated):
Detection checks for vulnerable version of FortiOS.

Note: Detection is made potential because the signature doesn't differentiate FortiGate E-series and F-series models and their versions.

Vulnerable version of FortiOS may allow an attacker to execute arbitrary code via specially crafted installation images.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as High - 6.8 severity.
    • Solution

    Vendor has released fixes to address this vulnerability
    For more details refer advisory FG-IR-21-115

    Vendor References

    CVEs related to QID 43912

    CVE-2021-36173 |
    Software Advisories
    Advisory ID Software Component Link
    FG-IR-21-115 URL Logo www.fortiguard.com/psirt/FG-IR-21-115
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].