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FortinetCVE-2019-15703

HistoryOct 24, 2019 - 2:15 p.m.

CVE-2019-15703

2019-10-2414:15:11

CWE-331

fortinet

web.nvd.nist.gov

cve-2019-15703

insufficient entropy

prng vulnerability

fortinet fortios

fortigate vm models

ecdsa secret

tls client

rsa handshake

side channel attacks

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7.5

Confidence

High

EPSS

0.002

Percentile

54.0%

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 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.

Affected configurations

Nvd

Node

fortinetfortiosRange≤5.6.9

fortinetfortiosRange6.0.0–6.0.9

fortinetfortiosRange6.2.0–6.2.3

VendorProductVersionCPE
fortinetfortios*cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
fortinet	fortios	*	cpe:2.3:o:fortinet:fortios::::::::

CNA Affected

[
  {
    "product": "Fortinet FortiOS",
    "vendor": "Fortinet",
    "versions": [
      {
        "status": "affected",
        "version": "6.2.1"
      },
      {
        "status": "affected",
        "version": "6.2.0"
      },
      {
        "status": "affected",
        "version": "6.0.8 and below"
      }
    ]
  }
]

References

fortiguard.com/psirt/FG-IR-19-186

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7.5

Confidence

High

EPSS

0.002

Percentile

54.0%

JSON

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