CVE-2019-17657 Denial of service in FortiAP-S/W2
Attackers can cause denial of service on Fortinet admin webUIs by sending slow, crafted HTTP requests, affecting network administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-17657?
CVE-2019-17657 is a high-severity denial of service vulnerability in Fortinet Fortianalyzer, published on 7 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An Uncontrolled Resource Consumption vulnerability in Fortinet FortiSwitch below 3.6.11, 6.0.6 and 6.2.2, FortiAnalyzer below 6.2.3, FortiManager below 6.2.3 and FortiAP-S/W2 below 6.2.2 may allow an attacker to cause admin webUI denial of service (DoS) via handling special crafted HTTP requests/responses in pieces slowly, as demonstrated by Slow HTTP DoS Attacks.
Weakness: CWE-400
Which versions are affected by CVE-2019-17657?
It affects 5 products.
Products include Fortinet Fortianalyzer, Fortinet Fortiap-S, Fortinet Fortiap-W2, Fortinet Fortimanager, Fortinet Fortiswitch.
How do I fix CVE-2019-17657?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-17657 being exploited?
There is no known exploitation of CVE-2019-17657 in the wild and no public exploit code.
Other vulnerabilities in Fortinet Fortianalyzer
- CVE-2026-24858 Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel
- CVE-2023-25610 Memory corruption in FortiAnalyzer
- CVE-2021-32603 Server-side request forgery in Fortinet FortiAnalyzer, FortiManager
- CVE-2020-12817 Cross-site scripting in Fortinet FortiAnalyzer
- CVE-2024-48886 Auth bypass in FortiOS
Sources
Also known as ALPINE-CVE-2019-17657, CLEANSTART-2026-LB59576, GHSA-j8g4-vw7x-cwpr.