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[email protected]CVE-2019-1715

HistoryMay 03, 2019 - 5:29 p.m.

CVE-2019-1715

2019-05-0317:29:00

CWE-332

[email protected]

web.nvd.nist.gov

cve-2019-1715

vulnerability

deterministic random bit generator

drbg

pseudorandom number generator

prng

cisco

asa

ftd

software

remote attackers

cryptographic collision

private key discovery

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

7.5 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

71.4%

JSON

A vulnerability in the Deterministic Random Bit Generator (DRBG), also known as Pseudorandom Number Generator (PRNG), used in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a cryptographic collision, enabling the attacker to discover the private key of an affected device. The vulnerability is due to insufficient entropy in the DRBG when generating cryptographic keys. An attacker could exploit this vulnerability by generating a large number of cryptographic keys on an affected device and looking for collisions with target devices. A successful exploit could allow the attacker to impersonate an affected target device or to decrypt traffic secured by an affected key that is sent to or from an affected target device.

Affected configurations

NVD

Node

ciscoadaptive_security_appliance_device_managerRange9.8–9.8.4

ciscoadaptive_security_appliance_device_managerRange9.9–9.9.2.50

ciscofirepower_threat_defenseRange6.2.1–6.2.3.12

ciscofirepower_threat_defenseRange6.3.0–6.3.0.3

AND

ciscoasa-5506-xMatch-

ciscoasa-5506h-xMatch-

ciscoasa-5506w-xMatch-

ciscoasa-5508-xMatch-

ciscoasa-5516-xMatch-

ciscoasa-5525-xMatch-

ciscoasa-5545-xMatch-

ciscoasa-5555-xMatch-

ciscoasa_5500Match-

CPENameOperatorVersion
cisco:adaptive_security_appliance_device_managercisco adaptive security appliance device managerlt9.8.4
cisco:adaptive_security_appliance_device_managercisco adaptive security appliance device managerlt9.9.2.50
cisco:firepower_threat_defensecisco firepower threat defenselt6.2.3.12
cisco:firepower_threat_defensecisco firepower threat defenselt6.3.0.3

CPE	Name	Operator	Version
cisco:adaptive_security_appliance_device_manager	cisco adaptive security appliance device manager	lt	9.8.4
cisco:adaptive_security_appliance_device_manager	cisco adaptive security appliance device manager	lt	9.9.2.50
cisco:firepower_threat_defense	cisco firepower threat defense	lt	6.2.3.12
cisco:firepower_threat_defense	cisco firepower threat defense	lt	6.3.0.3

CNA Affected

[
  {
    "product": "Cisco Adaptive Security Appliance (ASA) Software ",
    "vendor": "Cisco",
    "versions": [
      {
        "lessThan": "9.8.4",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "9.9.2.50",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Cisco Firepower Threat Defense (FTD) Software ",
    "vendor": "Cisco",
    "versions": [
      {
        "lessThan": "6.2.3.12",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "6.3.0.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftd-entropy

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

7.5 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

71.4%

JSON

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