CVE-2021-31353

Published Oct 19, 2021

Last updated 3 years ago

CVSS high 7.5

Overview

Description: 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.
Source: sirt@juniper.net
NVD status: Analyzed

Risk scores

CVSS 3.1

Type: Primary
Base score: 7.5
Impact score: 3.6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: HIGH

CVSS 2.0

Type: Primary
Base score: 5
Impact score: 2.9
Exploitability score: 10
Vector string: AV:N/AC:L/Au:N/C:N/I:N/A:P

Weaknesses

nvd@nist.gov: CWE-755
sirt@juniper.net: CWE-755

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:juniper:junos:19.3:r3-s2:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "D3FEA876-302D-4F07-94E6-237C669538F2"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:19.4:r3-s3:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "0886EFA6-47E3-4C1D-A278-D3891A487FED"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "3A58292B-814C-49E7-8D6D-BE26EFB9ADDF"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.2:r3:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "681AE183-7183-46E7-82EA-28C398FA1C3D"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.2:r3-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "8A6E9627-8BF1-4BE8-844B-EE8F1C9478F0"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.3:r2:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "05D8427C-CDDE-4B2F-9CB8-41B9137660E4"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.3:r2-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "F3DC01F2-6DFE-4A8E-9962-5E59AA965935"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "C54B047C-4B38-40C0-9855-067DCF7E48BD"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "38984199-E332-4A9C-A4C0-78083D052E15"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:21.1:r1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "625BA7E6-D2AD-4A48-9B94-24328BE5B06A"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos:21.1:r1-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "F462F4E3-762C-429F-8D25-5521100DD37C"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "4C8EA231-338B-46A2-BE77-3A7AB54BD148",
            "versionEndIncluding": "20.3"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "C9C8866D-162F-4C9B-8167-2FBA25410368"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "F85E5BC7-8607-4330-AA72-2273D32F8604"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s2:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "878C81C9-A418-4A21-8FDB-2116A992679C"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r2:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "7451A671-A3CC-4904-8D45-947B1D3783C9"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r2-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "0108AD20-EAE6-41D1-AE48-254C46B5388A"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r2-s2:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "44FBCA6F-EB05-4EE4-85FD-944BDAF7D81B"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "AE674DD3-3590-4434-B144-5AD7EB5F039D"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:21.1:r1-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "0099BDA9-9D4B-4D6C-8234-EFD9E8C63476"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:21.2:r1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "3EA3DC63-B290-4D15-BEF9-21DEF36CA2EA"
          },
          {
            "criteria": "cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s1:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "7E1E57AF-979B-4022-8AD6-B3558E06B718"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Risk scores

CVSS 3.1

CVSS 2.0

Weaknesses

Social media

Configurations

References