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JuniperCVE-2021-31363

HistoryOct 19, 2021 - 7:15 p.m.

CVE-2021-31363

2021-10-1919:15:09

CWE-835

juniper

web.nvd.nist.gov

cve-2021-31363

mpls

p2mp

vulnerability

juniper networks

junos os

dos

nvd

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

25.2%

JSON

In an MPLS P2MP environment a Loop with Unreachable Exit Condition vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause high load on RPD which in turn may lead to routing protocol flaps. If a system with sensor-based-stats enabled receives a specific LDP FEC this can lead to the above condition. Continued receipted of such an LDP FEC will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 19.2 version 19.2R2 and later versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2-S1, 20.2R3; 20.3 versions prior to 20.3R1-S2, 20.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R2. Juniper Networks Junos OS Evolved All versions prior to 20.1R2-S3-EVO; 20.3 versions prior to 20.3R1-S2-EVO.

Affected configurations

Nvd

Node

juniperjunosMatch19.2r2

juniperjunosMatch19.2r2-s1

juniperjunosMatch19.2r3

juniperjunosMatch19.2r3-s1

juniperjunosMatch19.2r3-s2

juniperjunosMatch19.3-

juniperjunosMatch19.3r1

juniperjunosMatch19.3r1-s1

juniperjunosMatch19.3r2

juniperjunosMatch19.3r2-s1

juniperjunosMatch19.3r2-s2

juniperjunosMatch19.3r2-s3

juniperjunosMatch19.3r2-s4

juniperjunosMatch19.3r2-s5

juniperjunosMatch19.3r3-s2

juniperjunosMatch19.4r1

juniperjunosMatch19.4r1-s1

juniperjunosMatch19.4r1-s2

juniperjunosMatch19.4r1-s3

juniperjunosMatch19.4r2-s4

juniperjunosMatch19.4r3-s2

juniperjunosMatch20.1r1

juniperjunosMatch20.1r1-s1

juniperjunosMatch20.1r1-s2

juniperjunosMatch20.1r1-s3

juniperjunosMatch20.1r1-s4

juniperjunosMatch20.1r2

juniperjunosMatch20.1r3

juniperjunosMatch20.2r1

juniperjunosMatch20.2r1-s1

juniperjunosMatch20.2r1-s2

juniperjunosMatch20.2r1-s3

juniperjunosMatch20.2r2

juniperjunosMatch20.2r3

juniperjunosMatch20.3r1

juniperjunosMatch20.3r1-s1

juniperjunosMatch20.3r2

juniperjunos_os_evolvedMatch20.1r1

juniperjunos_os_evolvedMatch20.1r1-s1

juniperjunos_os_evolvedMatch20.1r2

juniperjunos_os_evolvedMatch20.1r2-s1

juniperjunos_os_evolvedMatch20.1r2-s2

juniperjunos_os_evolvedMatch20.2r1

juniperjunos_os_evolvedMatch20.2r1-s1

juniperjunos_os_evolvedMatch20.2r2

juniperjunos_os_evolvedMatch20.3r1

juniperjunos_os_evolvedMatch20.3r1-s1

VendorProductVersionCPE
juniperjunos19.2cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:*
juniperjunos19.2cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:*
juniperjunos19.2cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:*
juniperjunos19.2cpe:2.3:o:juniper:junos:19.2:r3-s1:*:*:*:*:*:*
juniperjunos19.2cpe:2.3:o:juniper:junos:19.2:r3-s2:*:*:*:*:*:*
juniperjunos19.3cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*
juniperjunos19.3cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:*
juniperjunos19.3cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*
juniperjunos19.3cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*
juniperjunos19.3cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*

Vendor	Product	Version	CPE
juniper	junos	19.2	cpe:2.3:o:juniper:junos:19.2:r2::::::
juniper	junos	19.2	cpe:2.3:o:juniper:junos:19.2:r2-s1::::::
juniper	junos	19.2	cpe:2.3:o:juniper:junos:19.2:r3::::::
juniper	junos	19.2	cpe:2.3:o:juniper:junos:19.2:r3-s1::::::
juniper	junos	19.2	cpe:2.3:o:juniper:junos:19.2:r3-s2::::::
juniper	junos	19.3	cpe:2.3:o:juniper:junos:19.3:-::::::
juniper	junos	19.3	cpe:2.3:o:juniper:junos:19.3:r1::::::
juniper	junos	19.3	cpe:2.3:o:juniper:junos:19.3:r1-s1::::::
juniper	junos	19.3	cpe:2.3:o:juniper:junos:19.3:r2::::::
juniper	junos	19.3	cpe:2.3:o:juniper:junos:19.3:r2-s1::::::

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CNA Affected

[
  {
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "19.2R2",
        "status": "unaffected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "changes": [
          {
            "at": "19.2R3-S3",
            "status": "unaffected"
          }
        ],
        "lessThan": "19.2*",
        "status": "affected",
        "version": "19.2R2",
        "versionType": "custom"
      },
      {
        "lessThan": "19.3R2-S6, 19.3R3-S2",
        "status": "affected",
        "version": "19.3",
        "versionType": "custom"
      },
      {
        "lessThan": "19.4R1-S4, 19.4R2-S4, 19.4R3-S2",
        "status": "affected",
        "version": "19.4",
        "versionType": "custom"
      },
      {
        "lessThan": "20.1R2-S1, 20.1R3",
        "status": "affected",
        "version": "20.1",
        "versionType": "custom"
      },
      {
        "lessThan": "20.2R2-S1, 20.2R3",
        "status": "affected",
        "version": "20.2",
        "versionType": "custom"
      },
      {
        "lessThan": "20.3R1-S2, 20.3R2",
        "status": "affected",
        "version": "20.3",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Junos OS Evolved",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "20.1R2-S3-EVO",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "20.3R1-S2-EVO",
        "status": "affected",
        "version": "20.3",
        "versionType": "custom"
      }
    ]
  }
]

References

kb.juniper.net/JSA11225

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

25.2%

JSON

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