github - ghsa-686h-45gr-mc75

GHSA-686H-45GR-MC75

Vulnerability from github – Published: 2022-05-24 17:48 – Updated: 2022-05-24 17:48

Details

Improper Handling of Unexpected Data in the firewall policer of Juniper Networks Junos OS on EX4300 switches allows matching traffic to exceed set policer limits, possibly leading to a limited Denial of Service (DoS) condition. When the firewall policer discard action fails on a Layer 2 port, it will allow traffic to pass even though it exceeds set policer limits. Traffic will not get discarded, and will be forwarded even though a policer discard action is configured. When the issue occurs, traffic is not discarded as desired, which can be observed by comparing the Input bytes with the Output bytes using the following command: user@junos> monitor interface traffic Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 37425422 (82616) 37425354 (82616) <<<< egress ge-0/0/1 Up 37425898 (82616) 37425354 (82616) <<<< ingress The expected output, with input and output counters differing, is shown below: Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 342420570 (54600) 342422760 (54600) <<<< egress ge-0/0/1 Up 517672120 (84000) 342420570 (54600) <<<< ingress This issue only affects IPv4 policing. IPv6 traffic and firewall policing actions are not affected by this issue. This issue affects Juniper Networks Junos OS on the EX4300: All versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-0243"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-04-22T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Improper Handling of Unexpected Data in the firewall policer of Juniper Networks Junos OS on EX4300 switches allows matching traffic to exceed set policer limits, possibly leading to a limited Denial of Service (DoS) condition. When the firewall policer discard action fails on a Layer 2 port, it will allow traffic to pass even though it exceeds set policer limits. Traffic will not get discarded, and will be forwarded even though a policer discard action is configured. When the issue occurs, traffic is not discarded as desired, which can be observed by comparing the Input bytes with the Output bytes using the following command: user@junos\u003e monitor interface traffic Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 37425422 (82616) 37425354 (82616) \u003c\u003c\u003c\u003c egress ge-0/0/1 Up 37425898 (82616) 37425354 (82616) \u003c\u003c\u003c\u003c ingress The expected output, with input and output counters differing, is shown below: Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 342420570 (54600) 342422760 (54600) \u003c\u003c\u003c\u003c egress ge-0/0/1 Up 517672120 (84000) 342420570 (54600) \u003c\u003c\u003c\u003c ingress This issue only affects IPv4 policing. IPv6 traffic and firewall policing actions are not affected by this issue. This issue affects Juniper Networks Junos OS on the EX4300: All versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2.",
  "id": "GHSA-686h-45gr-mc75",
  "modified": "2022-05-24T17:48:12Z",
  "published": "2022-05-24T17:48:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-0243"
    },
    {
      "type": "WEB",
      "url": "https://kb.juniper.net/JSA11136"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2021-0243 (GCVE-0-2021-0243)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-17 00:51

Summary

Severity ?

4.7 (Medium)


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

CWE

CWE-241 - Improper Handling of Unexpected Data Type
Denial of Service (DoS)

Assigner

juniper

References

URL

Tags

https://kb.juniper.net/JSA11136

x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Juniper Networks	Junos OS	Affected: unspecified , < 17.3R3-S10 (custom) Affected: 17.4 , < 17.4R3-S3 (custom) Affected: 18.1 , < 18.1R3-S11 (custom) Affected: 18.2 , < 18.2R3-S6 (custom) Affected: 18.3 , < 18.3R3-S4 (custom) Affected: 18.4 , < 18.4R3-S6 (custom) Affected: 19.1 , < 19.1R3-S3 (custom) Affected: 19.2 , < 19.2R3-S1 (custom) Affected: 19.3 , < 19.3R3-S1 (custom) Affected: 19.4 , < 19.4R3 (custom) Affected: 20.1 , < 20.1R2 (custom) Affected: 20.2 , < 20.2R2 (custom)

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JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T15:32:10.168Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          {
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              "x_refsource_MISC",
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            "url": "https://kb.juniper.net/JSA11136"
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        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "EX4300"
          ],
          "product": "Junos OS",
          "vendor": "Juniper Networks",
          "versions": [
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              "lessThan": "17.3R3-S10",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
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            {
              "lessThan": "17.4R3-S3",
              "status": "affected",
              "version": "17.4",
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              "lessThan": "18.1R3-S11",
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            {
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              "status": "affected",
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            {
              "lessThan": "19.2R3-S1",
              "status": "affected",
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              "status": "affected",
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              "versionType": "custom"
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          "value": "A sample affected firewall policer configuration is shown below:\n\n  set interfaces ge-0/0/1 unit 0 family ethernet-switching filter input TEST-Policer\n  set firewall family ethernet-switching filter TEST-Policer term 1 from ip-source-address 10.1.1.0/24\n  set firewall family ethernet-switching filter TEST-Policer term 1 then accept\n  set firewall family ethernet-switching filter TEST-Policer term 1 then policer TEST-Policer-Bandwidth\n  set firewall policer TEST-Policer-Bandwidth if-exceeding bandwidth-limit 50k\n  set firewall policer TEST-Policer-Bandwidth if-exceeding burst-size-limit 1500\n  set firewall policer TEST-Policer-Bandwidth then discard"
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      ],
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          "value": "Improper Handling of Unexpected Data in the firewall policer of Juniper Networks Junos OS on EX4300 switches allows matching traffic to exceed set policer limits, possibly leading to a limited Denial of Service (DoS) condition. When the firewall policer discard action fails on a Layer 2 port, it will allow traffic to pass even though it exceeds set policer limits. Traffic will not get discarded, and will be forwarded even though a policer discard action is configured. When the issue occurs, traffic is not discarded as desired, which can be observed by comparing the Input bytes with the Output bytes using the following command: user@junos\u003e monitor interface traffic Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 37425422 (82616) 37425354 (82616) \u003c\u003c\u003c\u003c egress ge-0/0/1 Up 37425898 (82616) 37425354 (82616) \u003c\u003c\u003c\u003c ingress The expected output, with input and output counters differing, is shown below: Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 342420570 (54600) 342422760 (54600) \u003c\u003c\u003c\u003c egress ge-0/0/1 Up 517672120 (84000) 342420570 (54600) \u003c\u003c\u003c\u003c ingress This issue only affects IPv4 policing. IPv6 traffic and firewall policing actions are not affected by this issue. This issue affects Juniper Networks Junos OS on the EX4300: All versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2."
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          "lang": "en",
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      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
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              "cweId": "CWE-241",
              "description": "CWE-241 Improper Handling of Unexpected Data Type",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "description": "Denial of Service (DoS)",
              "lang": "en",
              "type": "text"
            }
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      "providerMetadata": {
        "dateUpdated": "2021-04-22T19:37:07",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://kb.juniper.net/JSA11136"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S10, 17.4R3-S3, 18.1R3-S11, 18.2R3-S6, 18.3R3-S4, 18.4R3-S6, 19.1R3-S3, 19.2R3-S1, 19.3R3-S1, 19.4R3, 20.1R2, 20.2R2, 20.3R1, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA11136",
        "defect": [
          "1532670"
        ],
        "discovery": "USER"
      },
      "title": "Junos OS: EX4300: Stateless firewall policer fails to discard traffic",
      "workarounds": [
        {
          "lang": "en",
          "value": "There are no viable workarounds for this issue."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "sirt@juniper.net",
          "DATE_PUBLIC": "2021-04-14T16:00:00.000Z",
          "ID": "CVE-2021-0243",
          "STATE": "PUBLIC",
          "TITLE": "Junos OS: EX4300: Stateless firewall policer fails to discard traffic"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Junos OS",
                      "version": {
                        "version_data": [
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
                            "version_value": "17.3R3-S10"
                          },
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
                            "version_name": "17.4",
                            "version_value": "17.4R3-S3"
                          },
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
                            "version_name": "18.1",
                            "version_value": "18.1R3-S11"
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                          {
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                            "version_affected": "\u003c",
                            "version_name": "18.2",
                            "version_value": "18.2R3-S6"
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                          {
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                            "version_value": "18.3R3-S4"
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                            "version_name": "18.4",
                            "version_value": "18.4R3-S6"
                          },
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
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                            "version_value": "19.1R3-S3"
                          },
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
                            "version_name": "19.2",
                            "version_value": "19.2R3-S1"
                          },
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
                            "version_name": "19.3",
                            "version_value": "19.3R3-S1"
                          },
                          {
                            "platform": "EX4300",
                            "version_affected": "\u003c",
                            "version_name": "19.4",
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        "configuration": [
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            "lang": "en",
            "value": "A sample affected firewall policer configuration is shown below:\n\n  set interfaces ge-0/0/1 unit 0 family ethernet-switching filter input TEST-Policer\n  set firewall family ethernet-switching filter TEST-Policer term 1 from ip-source-address 10.1.1.0/24\n  set firewall family ethernet-switching filter TEST-Policer term 1 then accept\n  set firewall family ethernet-switching filter TEST-Policer term 1 then policer TEST-Policer-Bandwidth\n  set firewall policer TEST-Policer-Bandwidth if-exceeding bandwidth-limit 50k\n  set firewall policer TEST-Policer-Bandwidth if-exceeding burst-size-limit 1500\n  set firewall policer TEST-Policer-Bandwidth then discard"
          }
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              "lang": "eng",
              "value": "Improper Handling of Unexpected Data in the firewall policer of Juniper Networks Junos OS on EX4300 switches allows matching traffic to exceed set policer limits, possibly leading to a limited Denial of Service (DoS) condition. When the firewall policer discard action fails on a Layer 2 port, it will allow traffic to pass even though it exceeds set policer limits. Traffic will not get discarded, and will be forwarded even though a policer discard action is configured. When the issue occurs, traffic is not discarded as desired, which can be observed by comparing the Input bytes with the Output bytes using the following command: user@junos\u003e monitor interface traffic Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 37425422 (82616) 37425354 (82616) \u003c\u003c\u003c\u003c egress ge-0/0/1 Up 37425898 (82616) 37425354 (82616) \u003c\u003c\u003c\u003c ingress The expected output, with input and output counters differing, is shown below: Interface Link Input bytes (bps) Output bytes (bps) ge-0/0/0 Up 342420570 (54600) 342422760 (54600) \u003c\u003c\u003c\u003c egress ge-0/0/1 Up 517672120 (84000) 342420570 (54600) \u003c\u003c\u003c\u003c ingress This issue only affects IPv4 policing. IPv6 traffic and firewall policing actions are not affected by this issue. This issue affects Juniper Networks Junos OS on the EX4300: All versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2."
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            }
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          {
            "lang": "en",
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    "dateUpdated": "2024-09-17T00:51:52.928Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-686H-45GR-MC75

CVE-2021-0243 (GCVE-0-2021-0243)

Tags

Sightings

Nomenclature