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.
Published 2019-10-24 14:15:11
Updated 2022-03-31 17:53:22
View at NVD,   CVE.org

Products affected by CVE-2019-15703

Exploit prediction scoring system (EPSS) score for CVE-2019-15703

0.17%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-15703

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
2.6
LOW AV:N/AC:H/Au:N/C:P/I:N/A:N
4.9
2.9
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9
3.6
NIST

CWE ids for CVE-2019-15703

  • The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-15703

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