CVE-2019-15703 Weak cryptography in Fortinet FortiOS

What is CVE-2019-15703?

CVE-2019-15703 is a high-severity vulnerability in Fortinet Fortios, published on 24 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Insufficient Entropy in PRNG vulnerability in Fortinet FortiOS 6.2.1, 6.2.0, 6.0.8 and below for device not enable hardware TRNG token and models not support builtin TRNG seed allows attacker to theoretically recover the long term ECDSA secret in a TLS client with a RSA handshake and mutual ECDSA authentication via the help of flush+reload side channel attacks in FortiGate VM models only.

Weakness: CWE-331

Which versions are affected by CVE-2019-15703?

It affects 1 product.

Products include Fortinet Fortios.

How do I fix CVE-2019-15703?

No fix has been published for CVE-2019-15703 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-15703 being exploited?

There is no known exploitation of CVE-2019-15703 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-rwg7-vwhm-3x8j.