CyberSecBulletin
CVE-2024-23666NVD status: Analyzed

FortiManager: Client-Side Enforcement of Server-Side Security

Published Updated By the CyberSecBulletin desk

CVE-2024-23666 is a high-severity client-side enforcement of server-side security vulnerability in FortiManager from Fortinet, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected FortiManager versions: 7.4.0 through 7.4.1; 7.2.0 through 7.2.4; 7.0.0 through 7.0.11, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 2.33% chance of exploitation within 30 days, higher than 84% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Fortianalyzer Big Data to 7.2.7 or a later version.
  2. Read the advisory on fortiguard.fortinet.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
FortinetFortiManager7.4.0 through 7.4.1; 7.2.0 through 7.2.4; 7.0.0 through 7.0.11; 6.4.0 through 6.4.14Not stated
FortinetFortiAnalyzer7.4.0 through 7.4.1; 7.2.0 through 7.2.4; 7.0.0 through 7.0.11; 6.4.0 through 6.4.14Not stated
FortinetFortianalyzer Big Data6.2.1 up to, but not including, 7.2.7; 7.4.07.2.7

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighCNA (fortinet.com)
CVSS 3.18.8HighNVD

Official description

A client-side enforcement of server-side security in Fortinet FortiAnalyzer-BigData at least version 7.4.0 and 7.2.0 through 7.2.6 and 7.0.1 through 7.0.6 and 6.4.5 through 6.4.7 and 6.2.5, FortiManager version 7.4.0 through 7.4.1 and 7.2.0 through 7.2.4 and 7.0.0 through 7.0.11 and 6.4.0 through 6.4.14, FortiAnalyzer version 7.4.0 through 7.4.1 and 7.2.0 through 7.2.4 and 7.0.0 through 7.0.11 and 6.4.0 through 6.4.14 allows attacker to improper access control via crafted requests.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Client-Side Enforcement of Server-Side Security

The product includes a server that relies on the client to implement a protection mechanism that is intended to protect the server.

How developers prevent this class of flaw

  • If some degree of trust is required between the two entities, then use integrity checking and strong authentication to ensure that the inputs are coming from a trusted source. Design the product so that this trust is managed in a centralized fashion, especially if there are complex or numerous communication channels, in order to reduce the risks that the implementer will mistakenly omit a check in a single code path.

More Client-Side Enforcement of Server-Side Security vulnerabilities (CWE-602)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in FortiManager

All FortiManager vulnerabilities

Recent Client-Side Enforcement of Server-Side Security vulnerabilities

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