github - ghsa-686h-45gr-mc75

ghsa-686h-45gr-mc75

Vulnerability from github

Published

2022-05-24 17:48

Modified

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

Vulnerability from cvelistv5

Published

2021-04-22 19:37

Modified

2024-09-17 00:51

Severity ?

4.7 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Summary

Junos OS: EX4300: Stateless firewall policer fails to discard traffic

References

▼	URL	Tags
	https://kb.juniper.net/JSA11136	x_refsource_MISC

Impacted products

▼	Vendor	Product
	Juniper Networks	Junos OS

Show details on NVD website

JSON

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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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          "ASSIGNER": "sirt@juniper.net",
          "DATE_PUBLIC": "2021-04-14T16:00:00.000Z",
          "ID": "CVE-2021-0243",
          "STATE": "PUBLIC",
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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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              "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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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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