github - ghsa-8j3v-w6gq-fj6q

GHSA-8J3V-W6GQ-FJ6Q

Vulnerability from github – Published: 2024-07-11 00:32 – Updated: 2025-02-07 21:31

Details

The issue is triggered when a high rate of concurrent SSH requests are received and terminated in a specific way, causing xinetd to crash, and leaving defunct sshd processes. Successful exploitation of this vulnerability blocks both SSH access as well as services which rely upon SSH, such as SFTP, and Netconf over SSH.

Once the system is in this state, legitimate users will be unable to SSH to the device until service is manually restored. See WORKAROUND section below.

Administrators can monitor an increase in defunct sshd processes by utilizing the CLI command:

> show system processes | match sshd root 25219 30901 0 Jul16 ? 00:00:00 [sshd]

This issue affects Juniper Networks Junos OS Evolved: * All versions prior to 21.4R3-S7-EVO * 22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-S2-EVO; * 22.4-EVO versions prior to 22.4R3-EVO; * 23.2-EVO versions prior to 23.2R2-EVO.

This issue does not affect Juniper Networks Junos OS Evolved 22.1-EVO nor 22.2-EVO.

Severity ?

7.5 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2024-39562"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-772"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-10T23:15:13Z",
    "severity": "HIGH"
  },
  "details": "A Missing Release of Resource after Effective Lifetime vulnerability the xinetd process, responsible for spawning SSH daemon (sshd) instances, of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial of Service (DoS) by blocking SSH access for legitimate users.  Continued receipt of these connections will create a sustained Denial of Service (DoS) condition.\n\nThe issue is triggered when a high rate of concurrent SSH requests are received and terminated in a specific way, causing xinetd to crash, and leaving defunct sshd processes. Successful exploitation of this vulnerability blocks both SSH access as well as services which rely upon SSH, such as SFTP, and\u00a0Netconf over SSH.\n\nOnce the system is in this state, legitimate users will be unable to SSH to the device until service is manually restored.\u00a0 See WORKAROUND section below.\n\nAdministrators can monitor an increase in defunct sshd processes by utilizing the CLI command:\n\n\u00a0 \u003e show system processes | match sshd\n\u00a0 root  \u00a0  25219 30901  0 Jul16 ?  \u00a0 \u00a0 \u00a0 00:00:00 [sshd] \u003cdefunct\u003e\n\nThis issue affects Juniper Networks Junos OS Evolved:\n  *  All versions prior to 21.4R3-S7-EVO\n  *  22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-S2-EVO;\n  *  22.4-EVO versions prior to 22.4R3-EVO;\n  *  23.2-EVO versions prior to 23.2R2-EVO.\n\n\n\nThis issue does not affect Juniper Networks Junos OS Evolved 22.1-EVO nor 22.2-EVO.",
  "id": "GHSA-8j3v-w6gq-fj6q",
  "modified": "2025-02-07T21:31:00Z",
  "published": "2024-07-11T00:32:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39562"
    },
    {
      "type": "WEB",
      "url": "https://supportportal.juniper.net/JSA75724"
    },
    {
      "type": "WEB",
      "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2024-39562 (GCVE-0-2024-39562)

Vulnerability from cvelistv5 – Published: 2024-07-10 22:47 – Updated: 2024-08-02 04:26

Summary

A Missing Release of Resource after Effective Lifetime vulnerability the xinetd process, responsible for spawning SSH daemon (sshd) instances, of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial of Service (DoS) by blocking SSH access for legitimate users. Continued receipt of these connections will create a sustained Denial of Service (DoS) condition. The issue is triggered when a high rate of concurrent SSH requests are received and terminated in a specific way, causing xinetd to crash, and leaving defunct sshd processes. Successful exploitation of this vulnerability blocks both SSH access as well as services which rely upon SSH, such as SFTP, and Netconf over SSH. Once the system is in this state, legitimate users will be unable to SSH to the device until service is manually restored. See WORKAROUND section below. Administrators can monitor an increase in defunct sshd processes by utilizing the CLI command: > show system processes | match sshd root 25219 30901 0 Jul16 ? 00:00:00 [sshd] <defunct> This issue affects Juniper Networks Junos OS Evolved: * All versions prior to 21.4R3-S7-EVO * 22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-S2-EVO; * 22.4-EVO versions prior to 22.4R3-EVO; * 23.2-EVO versions prior to 23.2R2-EVO. This issue does not affect Juniper Networks Junos OS Evolved 22.1-EVO nor 22.2-EVO.

Severity ?

7.5 (High)


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

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CWE

CWE-772 - Missing Release of Resource after Effective Lifetime

Assigner

juniper

References

URL

Tags

	https://supportportal.juniper.net/JSA75724	vendor-advisory
	https://www.first.org/cvss/calculator/4.0#CVSS:4.…	vendor-advisory

Impacted products

	Vendor	Product	Version
	Juniper Networks	Junos OS Evolved	Affected: 0 , < 21.4R3-S7-EVO (semver) Affected: 22.3-EVO , < 22.3R2-S2-EVO, 22.3R3-S2-EVO (semver) Affected: 22.4-EVO , < 22.4R3-EVO (semver) Affected: 23.2-EVO , < 23.2R2-EVO (semver) Unaffected: 22.1-EVO , < 22.1* (semver) Unaffected: 22.2-EVO , < 22.2* (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "junos_os_evolved",
            "vendor": "juniper",
            "versions": [
              {
                "lessThan": "21.4r3-s7",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:juniper:junos_os_evolved:22.3:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "junos_os_evolved",
            "vendor": "juniper",
            "versions": [
              {
                "lessThan": "22.3r2-s2",
                "status": "affected",
                "version": "22.3",
                "versionType": "custom"
              },
              {
                "lessThan": "22.3r3-s2",
                "status": "affected",
                "version": "22.3",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:juniper:junos_os_evolved:22.4:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "junos_os_evolved",
            "vendor": "juniper",
            "versions": [
              {
                "lessThan": "22.4r3",
                "status": "affected",
                "version": "22.4",
                "versionType": "custom"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:juniper:junos_os_evolved:23.2:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unaffected",
            "product": "junos_os_evolved",
            "vendor": "juniper",
            "versions": [
              {
                "lessThan": "23.2r2",
                "status": "affected",
                "version": "23.2",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-39562",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-11T13:09:33.942117Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-11T13:21:53.817Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T04:26:15.907Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://supportportal.juniper.net/JSA75724"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Junos OS Evolved",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "21.4R3-S7-EVO",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "22.3R2-S2-EVO, 22.3R3-S2-EVO",
              "status": "affected",
              "version": "22.3-EVO",
              "versionType": "semver"
            },
            {
              "lessThan": "22.4R3-EVO",
              "status": "affected",
              "version": "22.4-EVO",
              "versionType": "semver"
            },
            {
              "lessThan": "23.2R2-EVO",
              "status": "affected",
              "version": "23.2-EVO",
              "versionType": "semver"
            },
            {
              "lessThan": "22.1*",
              "status": "unaffected",
              "version": "22.1-EVO",
              "versionType": "semver"
            },
            {
              "lessThan": "22.2*",
              "status": "unaffected",
              "version": "22.2-EVO",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2024-07-10T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A Missing Release of Resource after Effective Lifetime vulnerability the xinetd process, responsible for spawning SSH daemon (sshd) instances, of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial of Service (DoS) by blocking SSH access for legitimate users.  Continued receipt of these connections will create a sustained Denial of Service (DoS) condition.\u003cbr\u003e\u003cbr\u003eThe issue is triggered when a high rate of concurrent SSH requests are received and terminated in a specific way, causing xinetd to crash, and leaving defunct sshd processes. Successful exploitation of this vulnerability blocks both SSH access as well as services which rely upon SSH, such as SFTP, and\u0026nbsp;Netconf over SSH.\u003cbr\u003e\u003cbr\u003eOnce the system is in this state, legitimate users will be unable to SSH to the device until service is manually restored.\u0026nbsp; See WORKAROUND section below.\u003cbr\u003e\u003cbr\u003eAdministrators can monitor an increase in defunct sshd processes by utilizing the CLI command:\u003cbr\u003e\u003cbr\u003e\u003ctt\u003e\u0026nbsp; \u0026gt; show system processes | match sshd\u003cbr\u003e\u0026nbsp; root  \u0026nbsp;  25219 30901  0 Jul16 ?  \u0026nbsp; \u0026nbsp; \u0026nbsp; 00:00:00 [sshd] \u0026lt;defunct\u0026gt;\u003c/tt\u003e\u003cbr\u003e\u003cbr\u003eThis issue affects Juniper Networks Junos OS Evolved:\u003cbr\u003e\u003cul\u003e\u003cli\u003eAll versions prior to 21.4R3-S7-EVO\u003c/li\u003e\u003cli\u003e22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-S2-EVO;\u003c/li\u003e\u003cli\u003e22.4-EVO versions prior to 22.4R3-EVO;\u003c/li\u003e\u003cli\u003e23.2-EVO versions prior to 23.2R2-EVO.\u003c/li\u003e\u003c/ul\u003e\u003cbr\u003eThis issue does not affect Juniper Networks Junos OS Evolved 22.1-EVO nor 22.2-EVO.\u003cbr\u003e"
            }
          ],
          "value": "A Missing Release of Resource after Effective Lifetime vulnerability the xinetd process, responsible for spawning SSH daemon (sshd) instances, of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to cause a Denial of Service (DoS) by blocking SSH access for legitimate users.  Continued receipt of these connections will create a sustained Denial of Service (DoS) condition.\n\nThe issue is triggered when a high rate of concurrent SSH requests are received and terminated in a specific way, causing xinetd to crash, and leaving defunct sshd processes. Successful exploitation of this vulnerability blocks both SSH access as well as services which rely upon SSH, such as SFTP, and\u00a0Netconf over SSH.\n\nOnce the system is in this state, legitimate users will be unable to SSH to the device until service is manually restored.\u00a0 See WORKAROUND section below.\n\nAdministrators can monitor an increase in defunct sshd processes by utilizing the CLI command:\n\n\u00a0 \u003e show system processes | match sshd\n\u00a0 root  \u00a0  25219 30901  0 Jul16 ?  \u00a0 \u00a0 \u00a0 00:00:00 [sshd] \u003cdefunct\u003e\n\nThis issue affects Juniper Networks Junos OS Evolved:\n  *  All versions prior to 21.4R3-S7-EVO\n  *  22.3-EVO versions prior to 22.3R2-S2-EVO, 22.3R3-S2-EVO;\n  *  22.4-EVO versions prior to 22.4R3-EVO;\n  *  23.2-EVO versions prior to 23.2R2-EVO.\n\n\n\nThis issue does not affect Juniper Networks Junos OS Evolved 22.1-EVO nor 22.2-EVO."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eJuniper SIRT is not aware of any malicious exploitation of this vulnerability.\u003c/p\u003e"
            }
          ],
          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-772",
              "description": "CWE-772 Missing Release of Resource after Effective Lifetime",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-07-10T22:47:22.616Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://supportportal.juniper.net/JSA75724"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eThe following software releases have been updated to resolve this specific issue: Junos OS Evolved 21.4R3-S7-EVO, 22.2R1-EVO, 22.3R2-S2-EVO, 22.3R3-S2-EVO, 22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO, and all subsequent releases.\u003c/p\u003e"
            }
          ],
          "value": "The following software releases have been updated to resolve this specific issue: Junos OS Evolved 21.4R3-S7-EVO, 22.2R1-EVO, 22.3R2-S2-EVO, 22.3R3-S2-EVO, 22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA75724",
        "defect": [
          "1741624"
        ],
        "discovery": "USER"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2024-04-10T16:00:00.000Z",
          "value": "Initial Publication"
        }
      ],
      "title": "Junos OS Evolved: A high rate of SSH connections causes a Denial of Service",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "There are no known workarounds for this issue."
            }
          ],
          "value": "There are no known workarounds for this issue."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.1.0-av217"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2024-39562",
    "datePublished": "2024-07-10T22:47:22.616Z",
    "dateReserved": "2024-06-25T15:12:53.249Z",
    "dateUpdated": "2024-08-02T04:26:15.907Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-8J3V-W6GQ-FJ6Q

CVE-2024-39562 (GCVE-0-2024-39562)

Tags

Sightings

Nomenclature