Vulnerability-Lookup

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

Title

Junos OS Evolved: Denial of Service due to receipt of specific genuine layer 2 frames.

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 mitre root Scorecard

References

1 reference

URL	Tags
https://kb.juniper.net/JSA11134	x_refsource_MISC

Impacted products

1 product

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

Date Public

2021-04-14 00:00

Show details on NVD website

JSON

To clipboard

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        "dateUpdated": "2021-04-22T19:37:05.000Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
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          "tags": [
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          ],
          "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": {
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        "defect": [
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        "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."
        }
      ],
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      "x_legacyV4Record": {
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          "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."
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            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
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    "dateReserved": "2020-10-27T00:00:00.000Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

VAR-202104-0580

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

Tags

Sightings

Nomenclature

Related by attack behaviour