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JuniperCVELIST:CVE-2020-1667

HistoryOct 16, 2020 - 8:31 p.m.

CVE-2020-1667 Junos OS: MX Series: Services card might restart due to a race condition when DNS filtering is enabled.

2020-10-1620:31:28

CWE-362

juniper

www.cve.org

junos os

dns filtering

services pic

vulnerability

restart

CVSS3

8.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

AI Score

8.3

Confidence

High

EPSS

0.001

Percentile

39.5%

JSON

When DNS filtering is enabled on Juniper Networks Junos MX Series with one of the following cards MS-PIC, MS-MIC or MS-MPC, an incoming stream of packets processed by the Multiservices PIC Management Daemon (mspmand) process might be bypassed due to a race condition. Due to this vulnerability, mspmand process, responsible for managing “URL Filtering service”, can crash, causing the Services PIC to restart. While the Services PIC is restarting, all PIC services including DNS filtering service (DNS sink holing) will be bypassed until the Services PIC completes its boot process. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S8; 18.3 versions prior to 18.3R3-S1; 18.4 versions prior to 18.4R3; 19.1 versions prior to 19.1R3; 19.2 versions prior to 19.2R2; 19.3 versions prior to 19.3R3. This issue does not affect Juniper Networks Junos OS 17.4, 18.1, and 18.2.

CNA Affected

[
  {
    "platforms": [
      "MX Series"
    ],
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "17.3R3-S8",
        "status": "affected",
        "version": "17.3",
        "versionType": "custom"
      },
      {
        "lessThan": "18.3R3-S1",
        "status": "affected",
        "version": "18.3",
        "versionType": "custom"
      },
      {
        "lessThan": "18.4R3",
        "status": "affected",
        "version": "18.4",
        "versionType": "custom"
      },
      {
        "lessThan": "19.1R3",
        "status": "affected",
        "version": "19.1",
        "versionType": "custom"
      },
      {
        "lessThan": "19.2R2",
        "status": "affected",
        "version": "19.2",
        "versionType": "custom"
      },
      {
        "lessThan": "19.3R3",
        "status": "affected",
        "version": "19.3",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "status": "unaffected",
        "version": "17.4"
      },
      {
        "status": "unaffected",
        "version": "18.1"
      },
      {
        "status": "unaffected",
        "version": "18.2"
      }
    ]
  }
]

References

kb.juniper.net/

CVSS3

8.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

AI Score

8.3

Confidence

High

EPSS

0.001

Percentile

39.5%

JSON

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