CVE-2024-55599: DNS type 65 resource record requests bypass DNS filter

Published Jul 8, 2025
·
Updated

An Improperly Implemented Security Check for Standard vulnerability [CWE-358] in FortiOS and FortiProxy may allow a remote unauthenticated user to bypass the DNS filter via Apple devices.

Other sources

An Improperly Implemented Security Check for Standard vulnerability [CWE-358] in FortiOS version 7.6.0, version 7.4.7 and below, 7.0 all versions, 6.4 all versions and FortiProxy version 7.6.1 and below, version 7.4.8 and below, 7.2 all versions, 7.0 all versions may allow a remote unauthenticated user to bypass the DNS filter via Apple devices.

— MITRE

Affected Software

18 affected componentsFixes available
Fortinet FortiOS<7.4.8, >7.0, >=6.4
Fortinet FortiProxy<7.6.1, <7.4.8, >7.2, >7.0
Fortinet FortiOS=.
Fortinet FortiOS>=7.4.0<=7.4.7
Fortinet FortiOS>=7.2.0<=7.2.10
Fortinet FortiOS>=7.0
Fortinet FortiOS>=6.4
Fortinet FortiProxy>=7.6.0<=7.6.1
Fortinet FortiProxy>=7.4.0<=7.4.8
Fortinet FortiProxy>=7.2
Fortinet FortiProxy>=7.0
Fortinet FortiSASE=4
Fortinet FortiProxy>=7.0.0<7.4.9
Fortinet FortiProxy>=7.6.0<7.6.2
Fortinet FortiSASE=24.4.32
Fortinet FortiOS>=6.4.0<7.2.11
Fortinet FortiOS>=7.4.0<7.4.8
Fortinet FortiOS=7.6.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.2.11
  2. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.4.8
  3. Upgrade

    Upgrade FortiOS to a version that resolves this vulnerability.

    Fixed in 7.6.1
  4. Upgrade

    Upgrade FortiProxy to a version that resolves this vulnerability.

    Fixed in 7.4.9
  5. Upgrade

    Upgrade FortiProxy to a version that resolves this vulnerability.

    Fixed in 7.6.2
  6. Upgrade

    Upgrade FortiSASE to a version that resolves this vulnerability.

    Fixed in 24.4.b

Event History

Jul 8, 2025
Advisory Published
via FortiGuard·12:00 AM
Data Sourced
via FortiGuard·12:00 AM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·02:41 PM
Data Sourced
via MITRE·02:41 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·03:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2024-55599?

The severity of CVE-2024-55599 has not been explicitly stated, but it may allow a remote unauthenticated user to bypass DNS filters, which poses significant risk.

2

How do I fix CVE-2024-55599?

To mitigate CVE-2024-55599, upgrade FortiOS and FortiProxy to the recommended versions: FortiOS to 7.6.1 or higher, and FortiProxy to 7.6.2 or higher.

3

Which versions of FortiOS are affected by CVE-2024-55599?

CVE-2024-55599 affects FortiOS versions 6.4.0 to 7.4.8 and versions prior to 7.0.

4

Is FortiProxy vulnerable to CVE-2024-55599?

Yes, FortiProxy versions 7.0 and above, specifically 7.2.0 to 7.4.8, are also affected by CVE-2024-55599.

5

What does CVE-2024-55599 exploit?

CVE-2024-55599 exploits an improperly implemented security check for standard DNS filtering capabilities.

Company

Resources

Contact

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