Security readout for executives and security teams
Plain-English summary
Affected Fortinet gateways may fail to enforce DNS filtering for traffic from Apple devices. An unauthenticated remote user could reach destinations that policy should block. The issue affects filtering integrity, not confidentiality or service availability, and is rated CVSS 4.9.
Executive priority
Schedule prompt remediation through normal vulnerability management, accelerating systems where DNS filtering protects regulated, restricted, or high-risk users. This is not presented as an emergency compromise event, but affected controls may provide less protection than leadership expects.
Technical view
CVE-2024-55599 is a CWE-358 security-check implementation flaw in specified FortiOS and FortiProxy releases. It is remotely reachable with low complexity, requires no privileges or user interaction, and can bypass DNS filtering via Apple devices. The CVSS vector indicates low integrity impact with no confidentiality or availability impact.
Likely exposure
Exposure is most relevant where affected FortiOS or FortiProxy versions enforce DNS-filter policies for Apple-device traffic. The bundle lists multiple affected release branches, but configuration-specific prerequisites and the precise Apple protocol behavior are not provided.
Exploitation context
The supplied record does not establish active exploitation, and the CVE is not listed as KEV in the bundle. The weakness is remotely reachable without authentication, but evidence about public proof-of-concept availability, observed attacks, or exploitation frequency is absent.
Researcher notes
The source bundle contains some version-detail ambiguity, particularly around FortiOS 7.2 listings. Use the Fortinet advisory as the authoritative applicability source. No technical root-cause detail, indicators of compromise, workaround specifics, or confirmed exploitation evidence is supplied.
Mitigation direction
- Inventory FortiOS and FortiProxy versions handling DNS-filtered Apple-device traffic.
- Consult Fortinet advisory FG-IR-24-053 for supported fixed releases or vendor-approved mitigations.
- Prioritize upgrades where DNS filtering is a required security or compliance control.
- Apply compensating DNS enforcement outside the affected appliance if immediate remediation is unavailable.
Validation and detection
- Confirm each appliance product, firmware version, and DNS-filter configuration against Fortinet's advisory.
- Identify Apple-device networks whose DNS traffic traverses affected appliances.
- Review logs for unexpectedly permitted DNS requests from Apple clients; absence does not prove non-exploitation.
- After remediation, safely verify that policy-blocked destinations remain blocked from managed Apple devices.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-358: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-55599 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:X/RC:X
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:X/RC:X3.91.4fortinetVulnerability scoring details
Base CVSS 3.1 score
4.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:X/RC:X
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://fortiguard.fortinet.com/psirt/FG-IR-24-053CVE reference, fortinet
- https://cert-portal.siemens.com/productcert/html/ssa-864900.htmlCVE reference, siemens-SADP
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improperly Implemented Security Check for Standard
Improperly Implemented Security Check for Standard represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.