Vulnerability-Lookup

FKIE_CVE-2018-0056

Vulnerability from fkie_nvd - Published: 2018-10-10 18:29 - Updated: 2026-06-17 01:29

Severity

6.5 (Medium) - CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3 (Medium) - CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

If a duplicate MAC address is learned by two different interfaces on an MX Series device, the MAC address learning function correctly flaps between the interfaces. However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series.

References

URL	Tags
sirt@juniper.net	http://www.securitytracker.com/id/1041857	Third Party Advisory, VDB Entry
sirt@juniper.net	https://kb.juniper.net/JSA10890	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.securitytracker.com/id/1041857	Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	https://kb.juniper.net/JSA10890	Vendor Advisory

Impacted products

Vendor	Product	Version
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	15.1
juniper	junos	16.1
juniper	junos	16.1
juniper	junos	16.1
juniper	junos	16.1
juniper	junos	16.2
juniper	junos	16.2
juniper	junos	17.1
juniper	junos	17.1
juniper	junos	17.2
juniper	junos	17.3
juniper	junos	17.3
juniper	junos	17.4
juniper	junos	17.4
juniper	junos	18.1
juniper	junos	18.1

JSON

To clipboard

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      "value": "If a duplicate MAC address is learned by two different interfaces on an MX Series device, the MAC address learning function correctly flaps between the interfaces. However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series."
    },
    {
      "lang": "es",
      "value": "Si una direcci\u00f3n MAC duplicada es aprendida por dos interfaces diferentes en un dispositivo MX Series, la funci\u00f3n de aprendizaje de direcciones MAC realiza flaps correctamente entre las interfaces. Sin embargo, el demonio L2ALD (Layer 2 Address Learning Daemon) podr\u00eda cerrarse inesperadamente al intentar eliminar la direcci\u00f3n MAC duplicada cuando esa entrada en concreto no se encuentra en la tabla interna de direcciones MAC. Este problema solo ocurre en los dispositivos MX Series con la VPN l2-backhaul configurada. No hay ning\u00fan otro producto o plataforma que se vea afectado por este problema. Las versiones afectadas de Juniper Networks Junos OS son: 15.1 en versiones anteriores a la 15.1R7-S1 en MX Series; 16.1 en versiones anteriores a la 16.1R4-S12, 16.1R6-S6 en MX Series; 16.2 en versiones anteriores a la 16.2R2-S7 en MX Series; 17.1 en versiones anteriores a la 17.1R2-S9 en MX Series; 17.2 en versiones anteriores a la 17.2R1-S7, 17.2R2-S6 en MX Series; 17.3 en versiones anteriores a la 17.3R2-S4, 17.3R3-S1 en MX Series; 17.4 en versiones anteriores a la 17.4R1-S5 en MX Series y 18.1 en versiones anteriores a la 18.1R2 en MX Series."
    }
  ],
  "id": "CVE-2018-0056",
  "lastModified": "2026-06-17T01:29:30.263",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
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          "accessVector": "ADJACENT_NETWORK",
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          "baseScore": 2.9,
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}

CVE-2018-0056 (GCVE-0-2018-0056)

Vulnerability from cvelistv5 – Published: 2018-10-10 18:00 – Updated: 2024-09-17 02:51

Title

MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

Denial of service

Assigner

juniper CNA under the mitre root

CNA scorecard B 84/100 over 193 records in the last 180 days details

References

2 references

URL	Tags
https://kb.juniper.net/JSA10890	x_refsource_CONFIRM
http://www.securitytracker.com/id/1041857	vdb-entryx_refsource_SECTRACK

Impacted products

1 product

Vendor	Product	Version
Juniper Networks	Junos OS	Affected: 15.1 , < 15.1R7-S1 (custom) Affected: 16.1 , < 16.1R4-S12, 16.1R6-S6 (custom) Affected: 16.2 , < 16.2R2-S7 (custom) Affected: 17.1 , < 17.1R2-S9 (custom) Affected: 17.2 , < 17.2R1-S7, 17.2R2-S6 (custom) Affected: 17.3 , < 17.3R2-S4, 17.3R3-S1 (custom) Affected: 17.4 , < 17.4R1-S5 (custom) Affected: 18.1 , < 18.1R2 (custom)

Date Public

2018-10-10 00:00

Show details on NVD website

JSON

To clipboard

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      "metrics": [
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          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2018-10-12T09:57:01.000Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://kb.juniper.net/JSA10890"
        },
        {
          "name": "1041857",
          "tags": [
            "vdb-entry",
            "x_refsource_SECTRACK"
          ],
          "url": "http://www.securitytracker.com/id/1041857"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "The following software releases have been updated to resolve this specific issue: 15.1R7-S1, 16.1R4-S12, 16.1R6-S6, 16.1R7, 16.2R2-S7, 16.2R3, 17.1R2-S9, 17.1R3, 17.2R1-S7, 17.2R2-S6, 17.2R3, 17.3R2-S4, 17.3R3-S1, 17.4R1-S5, 17.4R2, 18.1R2, 18.2R1, and all subsequent releases.\n\nThis fix has also been proactively committed into Junos OS: 15.1X49-D150, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590, 15.1X53-D68, 18.2X75-D5, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA10890",
        "defect": [
          "1338688"
        ],
        "discovery": "USER"
      },
      "title": "MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces",
      "workarounds": [
        {
          "lang": "en",
          "value": "There are no viable workarounds for this issue"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "sirt@juniper.net",
          "DATE_PUBLIC": "2018-10-10T16:00:00.000Z",
          "ID": "CVE-2018-0056",
          "STATE": "PUBLIC",
          "TITLE": "MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Junos OS",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003c",
                            "platform": "MX Series",
                            "version_affected": "\u003c",
                            "version_name": "15.1",
                            "version_value": "15.1R7-S1"
                          },
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                            "platform": "MX Series",
                            "version_affected": "\u003c",
                            "version_name": "16.2",
                            "version_value": "16.2R2-S7"
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                          {
                            "affected": "\u003c",
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                            "version_value": "17.1R2-S9"
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                            "platform": "MX Series",
                            "version_affected": "\u003c",
                            "version_name": "17.4",
                            "version_value": "17.4R1-S5"
                          },
                          {
                            "affected": "\u003c",
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                            "version_affected": "\u003c",
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                            "version_value": "18.1R2"
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              "value": "If a duplicate MAC address is learned by two different interfaces on an MX Series device, the MAC address learning function correctly flaps between the interfaces. However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series."
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            "baseSeverity": "MEDIUM",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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              "description": [
                {
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                  "value": "Denial of service"
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              ]
            }
          ]
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          }
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2018-0056",
    "datePublished": "2018-10-10T18:00:00.000Z",
    "dateReserved": "2017-11-16T00:00:00.000Z",
    "dateUpdated": "2024-09-17T02:51:55.327Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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