CVE-2021-0277 Junos OS and Junos OS Evolved: LLDP Out-of-Bounds Read vulnerability in l2cpd

2021-07-1520:00:47

CWE-125

juniper

www.cve.org

juniper networks

lldp

out-of-bounds read

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

Confidence

High

EPSS

0.002

Percentile

55.5%

JSON

An Out-of-bounds Read vulnerability in the processing of specially crafted LLDP frames by the Layer 2 Control Protocol Daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved may allow an attacker to cause a Denial of Service (DoS), or may lead to remote code execution (RCE). Continued receipt and processing of these frames, sent from the local broadcast domain, will repeatedly crash the l2cpd process and sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S18; 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved versions prior to 20.4R2-EVO.

CNA Affected

[
  {
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "12.3R12-S18",
        "status": "affected",
        "version": "12.3",
        "versionType": "custom"
      },
      {
        "lessThan": "15.1R7-S9",
        "status": "affected",
        "version": "15.1",
        "versionType": "custom"
      },
      {
        "lessThan": "17.3R3-S12",
        "status": "affected",
        "version": "17.3",
        "versionType": "custom"
      },
      {
        "lessThan": "17.4R2-S13, 17.4R3-S5",
        "status": "affected",
        "version": "17.4",
        "versionType": "custom"
      },
      {
        "lessThan": "18.1R3-S13",
        "status": "affected",
        "version": "18.1",
        "versionType": "custom"
      },
      {
        "lessThan": "18.2R3-S8",
        "status": "affected",
        "version": "18.2",
        "versionType": "custom"
      },
      {
        "lessThan": "18.3R3-S5",
        "status": "affected",
        "version": "18.3",
        "versionType": "custom"
      },
      {
        "lessThan": "18.4R2-S8, 18.4R3-S8",
        "status": "affected",
        "version": "18.4",
        "versionType": "custom"
      },
      {
        "lessThan": "19.1R3-S5",
        "status": "affected",
        "version": "19.1",
        "versionType": "custom"
      },
      {
        "lessThan": "19.2R3-S3",
        "status": "affected",
        "version": "19.2",
        "versionType": "custom"
      },
      {
        "lessThan": "19.3R2-S6, 19.3R3-S2",
        "status": "affected",
        "version": "19.3",
        "versionType": "custom"
      },
      {
        "lessThan": "19.4R1-S4, 19.4R2-S4, 19.4R3-S3",
        "status": "affected",
        "version": "19.4",
        "versionType": "custom"
      },
      {
        "lessThan": "20.1R2-S2, 20.1R3",
        "status": "affected",
        "version": "20.1",
        "versionType": "custom"
      },
      {
        "lessThan": "20.2R3-S1",
        "status": "affected",
        "version": "20.2",
        "versionType": "custom"
      },
      {
        "lessThan": "20.3R2-S1, 20.3R3",
        "status": "affected",
        "version": "20.3",
        "versionType": "custom"
      },
      {
        "lessThan": "20.4R2",
        "status": "affected",
        "version": "20.4",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "Junos OS Evolved",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "20.4R2-EVO",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]