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Full vulnerability report · 2024
CVE-2023-45586High confidence

Fortinet FortiProxy — Insufficient Verification of Data Authenticity

Fortinet · FortiProxy

4.7MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SSA-832273 · CSAF 2.0 · revision 12 · finalSiemens ProductCERTSSA-832273: Multiple Vulnerabilities in Fortigate NGFW Before V7.4.3 on RUGGEDCOM APE1808 Devices
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • RUGGEDCOM APE1808
Summary
An insufficient verification of data authenticity vulnerability [CWE-345] in FortiOS & FortiProxy SSL-VPN tunnel mode may allow an authenticated VPN user to send (but not receive) packets spoofing the IP of another user via crafted network packets.
Remediation
Update Fortigate NGFW to V7.4.3. Contact customer support to receive patch and update information.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-49878

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

An insufficient verification of data authenticity vulnerability [CWE-345] in Fortinet FortiOS SSL-VPN tunnel mode version 7.4.0 through 7.4.1, version 7.2.0 through 7.2.7 and before 7.0.12 & FortiProxy SSL-VPN tunnel mode version 7.4.0 through 7.4.1, version 7.2.0 through 7.2.7 and before 7.0.13 allows an authenticated VPN user to send (but not receive) packets spoofing the IP of another user via crafted network packets.

What

An insufficient verification of data authenticity vulnerability [CWE-345] in Fortinet FortiOS SSL-VPN tunnel mode version 7.4.0 through 7.4.1, version 7.2.0 through 7.2.7 and before 7.0.12 & FortiProxy SSL-VPN tunnel mode version 7.4.0 through 7.4.1, version 7.2.0 through 7.2.7 and before 7.0.13 allows an authenticated VPN user to send (but not receive) packets spoofing the IP of another user via crafted network packets.

Why

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

An insufficient verification of data authenticity vulnerability [CWE-345] in Fortinet FortiOS SSL-VPN tunnel mode version 7.4.0 through 7.4.1, version 7.2.0 through 7.2.7 and before 7.0.12 & FortiProxy SSL-VPN tunnel mode version 7.4.0 through 7.4.1, version 7.2.0 through 7.2.7 and before 7.0.13 allows an authenticated VPN user to send (but not receive) packets spoofing the IP of another user via crafted network packets.

Why

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Insufficient Verification of Data Authenticity → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-345 ↗

CWE-345: Insufficient Verification of Data Authenticity. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N/E:P/RL:X/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CNoneConfidentiality impact: No direct loss is represented by this metric.ILowIntegrity impact: A successful attack can cause a limited loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-345
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2024-1148Fortinet FortiOS und FortiProxy: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Fortinet FortiOS und Fortinet FortiProxy ausnutzen, um beliebigen Programmcode auszuführen und um Sicherheitsmaßnahmen zu umgehen.

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0404Multiples vulnérabilités dans les produits Fortinet

ps://www.fortiguard.com/psirt/FG-IR-24-052 Bulletin de sécurité Fortinet FG-IR-24-054 du 14 mai 2024 https://www.fortiguard.com/psirt/FG-IR-24-054 Bulletin de sécurité Fortinet FG-IR-24-120 du 14 mai 2024 https://www.fortiguard.com/psirt/FG-IR-24-120 Référence CVE CVE-2023-36640 https://www.cve.org/CVERecord?id=CVE-2023-36640 Référence CVE CVE-2023-40720 https://www.cve.org/CVERecord?id=CVE-2023-40720 Référence CVE CVE-2023-44247 https://www.cve.org/CVERecord?id=CVE-2023-44247 Référence CVE CVE-2023-45288 https://www.cve.org/CVERecord?id=CVE-2023-45288 Référence CVE CVE-2023-45583 https://www.cve.org/CVERecord?id=CVE-2023-45583 Référence CVE CVE-2023-45586 https://www.cve.org/CVERecord?id=CVE-2023-45586 Référence CVE CVE-2023-46714 https://www.cve.org/CVERecord?id=CVE-2023-46714 Référence CVE CVE-2023-48789 https://www.cve.org/CVERecord?id=CVE-2023-48789 Référence CVE CVE-2023-50180 https://www.cve.org/CVERecord?id=CVE-2023-50180 Référence CVE CVE-2024-21760 https://www.cve.org/CVERecord?id=CVE-2024-21760 Référence CVE CVE-2024-23105 https://www.cve.org/CVERecord?id=CVE-2024-23105 Référence CVE CVE-2024-23107 https://www.cve.org/CVERecord?id=CVE-2024-23107 Référence CVE CVE-2024-23664 https://www.cve.org/CVERecord?id=CVE-2024-23664 Référence CVE CVE-2024-23665 https://www.cve.org/CVERecord?id=

Official advisory
NCSC-NL · Dutch · NCSC-2024-0222Kwetsbaarheden verholpen in Fortinet FortiOS

Een kwaadwillende kan de kwetsbaarheden misbruiken om een Denial-of-Service te veroorzaken, VPN verkeer te manipuleren, of mogelijk code uit te voeren op de management-interface.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
RUGGEDCOM APE1808
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Update Fortigate NGFW to V7.4.3. Contact customer support to receive patch and update information.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 14 May 2024 · Last source change 2 Aug 2024, 20:21 UTC · CWE-345 · Insufficient Verification of Data Authenticity

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-49878
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2023-49878↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-45586 · cve.blacktree.nl