CVE-2023-36831

Estado: ModificadaAlta (7.5)—

An Improper Check or Handling of Exceptional Conditions vulnerability in the UTM (Unified Threat Management) Web-Filtering feature of Juniper Networks Junos OS on SRX Series causes a jbuf memory leak to occur when accessing certain websites, eventually leading to a Denial of Service (DoS) condition. Service restoration is only possible by rebooting the system.

The jbuf memory leak only occurs in SSL Proxy and UTM Web-Filtering configurations. Other products, platforms, and configurations are not affected by this vulnerability.

This issue does not affect Juniper Networks Junos OS versions prior to 22.2R2.

Detalles técnicos trazas, registros y código del informe original

This issue affects Juniper Networks Junos OS on SRX Series:
22.2 versions prior to 22.2R3;
22.3 versions prior to 22.3R2-S1, 22.3R3;
22.4 versions prior to 22.4R1-S2, 22.4R2.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.63%
Percentil entre todas las CVEs puntuadas: 49
Fecha de la puntuación: 7/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Juniper — Junos

CWE

CWE-703

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2023-36831",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-36831",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-11-07T14:39:03.046485Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "sirt@juniper.net",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "sirt@juniper.net",
      "affectedData": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "versions": [
            {
              "status": "affected",
              "version": "22.2",
              "lessThan": "22.2R3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "22.3",
              "lessThan": "22.3R2-S1, 22.3R3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "22.4",
              "lessThan": "22.4R1-S2, 22.4R2",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "unspecified",
              "lessThan": "22.2R2",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "SRX Series"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:juniper_networks:junos_os:*:*:*:*:*:*:*:*"
          ],
          "vendor": "juniper_networks",
          "product": "junos_os",
          "versions": [
            {
              "status": "affected",
              "version": "22.2",
              "lessThan": "22.2R3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "22.3",
              "lessThan": "22.3R2-S1",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "22.3",
              "lessThan": "22.3R3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "22.4",
              "lessThan": "22.4R1-S2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "22.4",
              "lessThan": "22.4R2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "0",
              "lessThan": "22.2R2",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2023-07-14T15:15:08.913",
  "references": [
    {
      "url": "https://supportportal.juniper.net/JSA71636",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "sirt@juniper.net"
    },
    {
      "url": "https://supportportal.juniper.net/JSA71636",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "sirt@juniper.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-703"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Improper Check or Handling of Exceptional Conditions vulnerability in the UTM (Unified Threat Management) Web-Filtering feature of Juniper Networks Junos OS on SRX Series causes a jbuf memory leak to occur when accessing certain websites, eventually leading to a Denial of Service (DoS) condition.  Service restoration is only possible by rebooting the system.\n\nThe jbuf memory leak only occurs in SSL Proxy and UTM Web-Filtering configurations.  Other products, platforms, and configurations are not affected by this vulnerability.\n\nThis issue affects Juniper Networks Junos OS on SRX Series:\n22.2 versions prior to 22.2R3;\n22.3 versions prior to 22.3R2-S1, 22.3R3;\n22.4 versions prior to 22.4R1-S2, 22.4R2.\n\nThis issue does not affect Juniper Networks Junos OS versions prior to 22.2R2.\n"
    }
  ],
  "lastModified": "2026-06-17T06:07:10.310",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.2:r1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E949B21B-AD62-4022-9088-06313277479E"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.2:r1-s1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8D862E6F-0D01-4B25-8340-888C30F75A2F"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.2:r1-s2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2F28F73E-8563-41B9-A313-BBAAD5B57A67"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.2:r2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E37D4694-C80B-475E-AB5B-BB431F59C5E1"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.2:r2-s1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5EC0D2D2-4922-4675-8A2C-57A08D7BE334"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.2:r2-s2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9EC91F9D-DEDA-46B4-A39F-59A2CDB86C2E"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.3:r1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "19519212-51DD-4448-B115-8A20A40192CC"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.3:r1-s1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5CC9909E-AE9F-414D-99B1-83AA04D5297B"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.3:r1-s2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FDE9E767-4713-4EA2-8D00-1382975A4A15"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.3:r2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "59DDA54E-6845-47EB-AE3C-5EC6BD33DFA7"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "28E42A41-7965-456B-B0AF-9D3229CE4D4C"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CB1A77D6-D3AD-481B-979C-8F778530B175"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:juniper:vsrx:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "36F68E75-E6C6-4DB4-AE0E-C5637ECE7C88"
            },
            {
              "criteria": "cpe:2.3:h:juniper:csrx:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "11D4A86D-BDB4-4A01-96FE-7E023C58074B"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx100:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "561C1113-3D59-4DD9-ADA7-3C9ECC4632EC"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx110:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "78C6D8A0-92D3-4FD3-BCC1-CC7C87B76317"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx1400:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "927EAB8B-EC3B-4B12-85B9-5517EBA49A30"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "2CEBF85C-736A-4E7D-956A-3E8210D4F70B"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx210:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "CD647C15-A686-4C8F-A766-BC29404C0FED"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx220:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "45AB1622-1AED-4CD7-98F1-67779CDFC321"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx240:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "89276D88-3B8D-4168-A2CD-0920297485F2"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx240h2:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "E020556B-693F-4963-BA43-3164AB50FA49"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx240m:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "AB0D31FF-0812-42B8-B25E-03C35EC1B021"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx300:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "BB5AB24B-2B43-43DD-AE10-F758B4B19F2A"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx320:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "80F9DC32-5ADF-4430-B1A6-357D0B29DB78"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx340:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "8B82D4C4-7A65-409A-926F-33C054DCBFBA"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx3400:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "746C3882-2A5B-4215-B259-EB1FD60C513D"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx345:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "CE535749-F4CE-4FFA-B23D-BF09C92481E5"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx3600:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "DDE64EC0-7E42-43AF-A8FA-1A233BD3E3BC"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx380:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "2305DA9D-E6BA-48F4-80CF-9E2DE7661B2F"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4000:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "06A03463-6B1D-4DBA-9E89-CAD5E899B98B"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4100:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "3AA8999C-8AE4-416F-BA2A-B1A21F33B4D7"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "CCC5F6F5-4347-49D3-909A-27A3A96D36C9"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "56BA6B86-D3F4-4496-AE46-AC513C6560FA"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5000:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "5ABA347C-3EF3-4F75-B4D1-54590A57C2BC"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5400:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "2FDDC897-747F-44DD-9599-7266F9B5B7B1"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx550:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "62FC145A-D477-4C86-89E7-F70F52773801"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx550_hm:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "06685D0E-A075-49A5-9EF4-34F0F795C8C6"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx550m:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "52F0B735-8C49-4B08-950A-296C9CDE43CA"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "68CA098D-CBE4-4E62-9EC0-43E1B6098710"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "66F474D4-79B6-4525-983C-9A9011BD958B"
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx650:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "8AA424D4-4DBF-4E8C-96B8-E37741B5403E"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "sirt@juniper.net"
}