FortiosOperating system · Fortinet
CVE-2024-36505
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn improper access control vulnerability [CWE-284] in FortiOS 7.4.0 through 7.4.3, 7.2.5 through 7.2.7, 7.0.12 through 7.0.14 and 6.4.x may allow an attacker who has already successfully obtained write access to the underlying system (via another hypothetical exploit) to bypass the file integrity checking system.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceFortiOS contains an improper access control vulnerability (CWE-284) that allows an attacker who has already obtained write access to the underlying system to bypass file integrity checking. This is a post-exploitation privilege escalation or defense-bypass scenario, not an initial access vector.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
FortiosOperating system
>= 6.4.13, <= 6.4.15>= 7.0.12, < 7.0.15>= 7.2.5, < 7.2.8>= 7.4.0, < 7.4.4CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Retrieve FortiOS versionLog into the FortiOS CLI and run the command: `get system status` or `execute diagnosis sys version`. This displays the current FortiOS firmware version installed on the device.Affected if The displayed version falls within any of these vulnerable ranges: 6.4.13 through 6.4.15 inclusive; 7.0.12 through 7.0.14 inclusive; 7.2.5 through 7.2.7 inclusive; or 7.4.0 through 7.4.3 inclusive.
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Confirm firmware branchFrom the version output, identify the major.minor branch (for example, 7.4.x, 7.2.x, 7.0.x, or 6.4.x).Affected if The device runs a firmware branch that has known vulnerable versions listed above.
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Check if device has write access exposureReview access logs, administrative sessions, and audit logs for any unauthorized or unexpected write-level access to the underlying system. Look for evidence of compromise that would indicate an attacker has already obtained write access.Affected if An attacker has already obtained write access to the underlying system (this is a post-exploitation scenario, so the file integrity bypass only matters if the system is already compromised at that level).
The environment is affected if the FortiOS version falls within the vulnerable ranges AND an attacker has already obtained write access to the underlying system, allowing them to bypass file integrity checking.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped7.0.157.2.87.4.4
Apply the appropriate FortiOS security patch for your version branch (7.4.4+, 7.2.8+, 7.0.15+, or 6.4.x fix) to address the file integrity checking bypass. Review access controls and monitor for unauthorized write attempts.
Upgrade to FortiOS 7.4.4, 7.2.8, 7.0.15, or 6.4.16 (or later) depending on current branch
- 1. Identify the current FortiOS version running on the device using 'get system status' or 'fortios -v'
- 2. Determine the appropriate upgrade path based on current version: for 6.4.13-6.4.15 upgrade to 6.4.16 or later; for 7.0.12-7.0.14 upgrade to 7.0.15; for 7.2.5-7.2.7 upgrade to 7.2.8; for 7.4.0-7.4.3 upgrade to 7.4.4
- 3. Download the firmware image from Fortinet customer support portal (https://support.fortinet.com)
- 4. Backup the current FortiOS configuration
- 5. Upload the firmware image via FortiGate web UI (System > Firmware) or CLI: 'execute firmware upgrade'
- 6. Reboot the device and verify the new version after boot-up using 'get system status'
- 7. Verify that the file integrity checking system is functioning normally
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Fortios
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-36505 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-36505 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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