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[email protected]CVE-2021-31353

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

CVE-2021-31353

2021-10-1919:15:08

CWE-755

[email protected]

web.nvd.nist.gov

cve-2021-31353

juniper networks

junos os

junos os evolved

bgp

dos

security vulnerability

nvd

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

46.5%

JSON

An Improper Handling of Exceptional Conditions vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an attacker to inject a specific BGP update, causing the routing protocol daemon (RPD) to crash and restart, leading to a Denial of Service (DoS). Continued receipt and processing of the BGP update will create a sustained Denial of Service (DoS) condition. This issue affects very specific versions of Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versions 20.2R2-S3 and later, prior to 20.2R3-S2; 20.3 versions 20.3R2 and later, prior to 20.3R3; 20.4 versions 20.4R2 and later, prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS 20.1 is not affected by this issue. This issue also affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versions prior to 21.1R2-EVO; 21.2-EVO versions prior to 21.2R2-EVO.

Affected configurations

NVD

Node

juniperjunosMatch19.3r3-s2

juniperjunosMatch19.4r3-s3

juniperjunosMatch20.2r2-s3

juniperjunosMatch20.2r3

juniperjunosMatch20.2r3-s1

juniperjunosMatch20.3r2

juniperjunosMatch20.3r2-s1

juniperjunosMatch20.4r2

juniperjunosMatch20.4r2-s1

juniperjunosMatch21.1r1

juniperjunosMatch21.1r1-s1

juniperjunos_os_evolvedRange≤20.3

juniperjunos_os_evolvedMatch20.4r1

juniperjunos_os_evolvedMatch20.4r1-s1

juniperjunos_os_evolvedMatch20.4r1-s2

juniperjunos_os_evolvedMatch20.4r2

juniperjunos_os_evolvedMatch20.4r2-s1

juniperjunos_os_evolvedMatch20.4r2-s2

juniperjunos_os_evolvedMatch21.1r1

juniperjunos_os_evolvedMatch21.1r1-s1

juniperjunos_os_evolvedMatch21.2r1

juniperjunos_os_evolvedMatch21.2r1-s1

CPENameOperatorVersion
juniper:junosjuniper junoseq19.3
juniper:junosjuniper junoseq19.4
juniper:junosjuniper junoseq20.2
juniper:junosjuniper junoseq20.3
juniper:junosjuniper junoseq20.4
juniper:junosjuniper junoseq21.1
juniper:junos_os_evolvedjuniper junos os evolvedle20.3
juniper:junos_os_evolvedjuniper junos os evolvedeq20.4
juniper:junos_os_evolvedjuniper junos os evolvedeq21.1
juniper:junos_os_evolvedjuniper junos os evolvedeq21.2

CPE	Name	Operator	Version
juniper:junos	juniper junos	eq	19.3
juniper:junos	juniper junos	eq	19.4
juniper:junos	juniper junos	eq	20.2
juniper:junos	juniper junos	eq	20.3
juniper:junos	juniper junos	eq	20.4
juniper:junos	juniper junos	eq	21.1
juniper:junos_os_evolved	juniper junos os evolved	le	20.3
juniper:junos_os_evolved	juniper junos os evolved	eq	20.4
juniper:junos_os_evolved	juniper junos os evolved	eq	21.1
juniper:junos_os_evolved	juniper junos os evolved	eq	21.2

CNA Affected

[
  {
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "19.3R3-S2",
        "status": "unaffected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "19.3R3-S2"
      },
      {
        "status": "affected",
        "version": "19.4R3-S3"
      },
      {
        "lessThan": "20.1*",
        "status": "unaffected",
        "version": "20.1R1",
        "versionType": "custom"
      },
      {
        "changes": [
          {
            "at": "20.2R3-S2",
            "status": "unaffected"
          }
        ],
        "lessThan": "20.2R2-S3",
        "status": "unaffected",
        "version": "20.2",
        "versionType": "custom"
      },
      {
        "changes": [
          {
            "at": "20.3R3",
            "status": "unaffected"
          }
        ],
        "lessThan": "20.3R2",
        "status": "unaffected",
        "version": "20.3",
        "versionType": "custom"
      },
      {
        "changes": [
          {
            "at": "20.4R3",
            "status": "unaffected"
          }
        ],
        "lessThan": "20.4R2",
        "status": "unaffected",
        "version": "20.4",
        "versionType": "custom"
      },
      {
        "lessThan": "21.1R2",
        "status": "affected",
        "version": "21.1",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Junos OS Evolved",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "20.4R2-S3-EVO, 20.4R3-EVO",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      },
      {
        "lessThan": "21.1R2-EVO",
        "status": "affected",
        "version": "21.1-EVO",
        "versionType": "custom"
      },
      {
        "lessThan": "21.2R2-EVO",
        "status": "affected",
        "version": "21.2-EVO",
        "versionType": "custom"
      }
    ]
  }
]

References

kb.juniper.net/JSA11218

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

46.5%

JSON

Related for CVE-2021-31353

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