CVE-2019-15705 Denial of service in FortiGate

What is CVE-2019-15705?

CVE-2019-15705 is a high-severity denial of service vulnerability in Fortinet Fortios, published on 27 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Improper Input Validation vulnerability in the SSL VPN portal of FortiOS versions 6.2.1 and below, and 6.0.6 and below may allow an unauthenticated remote attacker to crash the SSL VPN service by sending a crafted POST request.

Weakness: CWE-20

Which versions are affected by CVE-2019-15705?

It affects 1 product.

Products include Fortinet Fortios.

How do I fix CVE-2019-15705?

No fix has been published for CVE-2019-15705 yet. Limit exposure of the affected software until one is available.

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-2019-15705 being exploited?

There is no known exploitation of CVE-2019-15705 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mrc8-q5x7-fjr7.