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cve[email protected]CVE-2019-15703
HistoryOct 24, 2019 - 2:15 p.m.

CVE-2019-15703

2019-10-2414:15:11
CWE-331
web.nvd.nist.gov
60
cve-2019-15703
insufficient entropy
prng vulnerability
fortinet fortios
fortigate vm models
ecdsa secret
tls client
rsa handshake
side channel attacks

2.6 Low

CVSS2

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

7.5 High

CVSS3

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

7.5 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

54.1%

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
fortinetfortiosRange5.6.9
OR
fortinetfortiosRange6.0.06.0.9
OR
fortinetfortiosRange6.2.06.2.3

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"
      }
    ]
  }
]

2.6 Low

CVSS2

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

7.5 High

CVSS3

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

7.5 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

54.1%