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JuniperCVELIST:CVE-2023-36839

HistoryOct 12, 2023 - 10:56 p.m.

CVE-2023-36839 Junos OS and Junos OS Evolved: An l2cpd crash will occur when specific LLDP packets are received

2023-10-1222:56:24

CWE-1284

juniper

www.cve.org

juniper networks

l2cpd

lldp

dos

stp protocols

mvrp

erp

version

vulnerability

security advisory

cve-2023-36839

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

12.7%

JSON

An Improper Validation of Specified Quantity in Input vulnerability in the Layer-2 control protocols daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker who sends specific LLDP packets to cause a Denial of Service(DoS).

This issue occurs when specific LLDP packets are received and telemetry polling is being done on the device. The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP. Also, if any services depend on LLDP state (like PoE or VoIP device recognition), then these will also be affected.

This issue affects:

Juniper Networks Junos OS

All versions prior to 20.4R3-S8;
21.1 version 21.1R1 and later versions;
21.2 versions prior to 21.2R3-S5;
21.3 versions prior to 21.3R3-S4;
21.4 versions prior to 21.4R3-S3;
22.1 versions prior to 22.1R3-S2;
22.2 versions prior to 22.2R3;
22.3 versions prior to 22.3R2-S2;
22.4 versions prior to 22.4R2;

Juniper Networks Junos OS Evolved

All versions prior to 20.4R3-S8-EVO;
21.1 version 21.1R1-EVO and later versions;
21.2 versions prior to 21.2R3-S5-EVO;
21.3 versions prior to 21.3R3-S4-EVO;
21.4 versions prior to 21.4R3-S3-EVO;
22.1 versions prior to 22.1R3-S2-EVO;
22.2 versions prior to 22.2R3-EVO;
22.3 versions prior to 22.3R2-S2-EVO;
22.4 versions prior to 22.4R1-S1-EVO;

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "20.4R3-S8",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "21.1*",
        "status": "affected",
        "version": "21.1R1",
        "versionType": "semver"
      },
      {
        "lessThan": "21.2R3-S5",
        "status": "affected",
        "version": "21.2",
        "versionType": "semver"
      },
      {
        "lessThan": "21.3R3-S4",
        "status": "affected",
        "version": "21.3",
        "versionType": "semver"
      },
      {
        "lessThan": "21.4R3-S3",
        "status": "affected",
        "version": "21.4",
        "versionType": "semver"
      },
      {
        "lessThan": "22.1R3-S2",
        "status": "affected",
        "version": "22.1",
        "versionType": "semver"
      },
      {
        "lessThan": "22.2R3",
        "status": "affected",
        "version": "22.2",
        "versionType": "semver"
      },
      {
        "lessThan": "22.3R2-S2, 22.3R3",
        "status": "affected",
        "version": "22.3",
        "versionType": "semver"
      },
      {
        "lessThan": "22.4R2",
        "status": "affected",
        "version": "22.4",
        "versionType": "semver"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "Junos OS Evolved",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "20.4R3-S8-EVO",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "21.1*-EVO",
        "status": "affected",
        "version": "21.1R1-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "21.2R3-S5-EVO",
        "status": "affected",
        "version": "21.2-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "21.3R3-S4-EVO",
        "status": "affected",
        "version": "21.3-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "21.4R3-S3-EVO",
        "status": "affected",
        "version": "21.4-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "22.1R3-S2-EVO",
        "status": "affected",
        "version": "22.1-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "22.2R3-EVO",
        "status": "affected",
        "version": "22.2-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "22.3R2-S2-EVO, 22.3R3-EVO",
        "status": "affected",
        "version": "22.3-EVO",
        "versionType": "semver"
      },
      {
        "lessThan": "22.4R1-S1-EVO, 22.4R2-EVO",
        "status": "affected",
        "version": "22.4-EVO",
        "versionType": "semver"
      }
    ]
  }
]

References

supportportal.juniper.net/JSA73171

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

12.7%

JSON

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