CVE-2019-15703 json
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 a…
published 2019-10-24 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-6640
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- fortinet fortios 6.0.9, 6.2.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
1.00% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.6 | AV:N/AC:H/Au:N/C:P/I:N/A:N |
Affected products
- Fortinet Fortinet FortiOS
Classification
- Weakness
-
- CWE-331 Insufficient Entropy
- Technology feeds
References
-
fortiguard.com
/psirt/FG-IR-19-186
vendor-advisory
Sources
- CVE List CVE-2019-15703
- NVD CVE-2019-15703
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