Improper signature verification in Fortinet IPS Engine
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-347.
Summary
Multiple padding oracle vulnerabilities (Zombie POODLE, GOLDENDOODLE, OpenSSL 0-length) in the CBC padding implementation of FortiOS IPS engine version 5.000 to 5.006, 4.000 to 4.036, 4.200 to 4.219, 3.547 and below, when configured with SSL Deep Inspection policies and with the IPS sensor enabled, may allow an attacker to decipher TLS connections going through the FortiGate via monitoring the traffic in a Man-in-the-middle position.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Fortinet IPS Engine | IPS engine version 5.000 to 5.006, 4.000 to 4.036, 4.200 to 4.219, 3.547 and below | — | No fix listed | CNA |
- Fortinet IPS Engine Vendor— Affected IPS engine version 5.000 to 5.006, 4.000 to 4.036, 4.200 to 4.219, 3.547 and below Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* | up to 3.00547; 4.00000 – 4.00036; 4.00200 – 4.00219; 5.00000 – 5.00006 | Vulnerable | Fortinet |
- cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:* Versions up to 3.00547; 4.00000 – 4.00036; 4.00200 – 4.00219; 5.00000 – 5.00006 Vulnerable ·Fortinet
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-5592
- 2026-10-03 Alias added: GHSA-3xmc-3r4g-3qf4
References
More Fortinet Fortios Ips Engine vulnerabilities
- TI-2023-21502 A interpretation conflict in Fortinet IPS Engine versions 7.321, 7.166 and 6.158 allows… CVSS 3.1HIGH 7.5
Sources
- CVE-2019-5592 · CVE Program
- CVE-2019-5592 · NVD
- FIRST EPSS
- GHSA-3xmc-3r4g-3qf4 · GitHub Advisory Database · CC BY 4.0
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