variot - var-202104-0580

VAR-202104-0580

Vulnerability from variot - Updated: 2023-12-18 13:27

In Juniper Networks Junos OS Evolved, receipt of a stream of specific genuine Layer 2 frames may cause the Advanced Forwarding Toolkit (AFT) manager process (Evo-aftmand), responsible for handling Route, Class-of-Service (CoS), Firewall operations within the packet forwarding engine (PFE) to crash and restart, leading to a Denial of Service (DoS) condition. By continuously sending this specific stream of genuine Layer 2 frames, an attacker can repeatedly crash the PFE, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R1-EVO. This issue does not affect Junos OS versions

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CVE-2021-0239 (GCVE-0-2021-0239)

Vulnerability from cvelistv5 – Published: 2021-04-22 19:37 – Updated: 2024-09-16 17:49

Summary

Severity ?

6.5 (Medium)


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

CWE

CWE-754 - Improper Check for Unusual or Exceptional Conditions
Denial of Service (DoS)

Assigner

juniper

References

URL

Tags

https://kb.juniper.net/JSA11134

x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Juniper Networks	Junos OS Evolved	Affected: unspecified , < 20.4R1-EVO (custom)

Show details on NVD website

JSON

To clipboard

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        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://kb.juniper.net/JSA11134"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 20.4R1-EVO, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA11134",
        "defect": [
          "1548758"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Junos OS Evolved: Denial of Service due to receipt of specific genuine layer 2 frames.",
      "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-2021-0239",
          "STATE": "PUBLIC",
          "TITLE": "Junos OS Evolved: Denial of Service due to receipt of specific genuine layer 2 frames."
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
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                  "product_data": [
                    {
                      "product_name": "Junos OS Evolved",
                      "version": {
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              "value": "In Juniper Networks Junos OS Evolved, receipt of a stream of specific genuine Layer 2 frames may cause the Advanced Forwarding Toolkit (AFT) manager process (Evo-aftmand), responsible for handling Route, Class-of-Service (CoS), Firewall operations within the packet forwarding engine (PFE) to crash and restart, leading to a Denial of Service (DoS) condition. By continuously sending this specific stream of genuine Layer 2 frames, an attacker can repeatedly crash the PFE, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R1-EVO. This issue does not affect Junos OS versions."
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          ]
        },
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            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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                  "lang": "eng",
                  "value": "CWE-754 Improper Check for Unusual or Exceptional Conditions"
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  "cveMetadata": {
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    "assignerShortName": "juniper",
    "cveId": "CVE-2021-0239",
    "datePublished": "2021-04-22T19:37:05.415854Z",
    "dateReserved": "2020-10-27T00:00:00",
    "dateUpdated": "2024-09-16T17:49:30.356Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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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

VAR-202104-0580

CVE-2021-0239 (GCVE-0-2021-0239)

Tags

Sightings

Nomenclature