Vulnerability-Lookup

GHSA-3366-GW57-FCM5

Vulnerability from github – Published: 2026-03-19 17:47 – Updated: 2026-03-25 21:33

Summary

Ella Core panics on malformed ULNASTransport Message without a Request Type

Details

Summary

Ella Core panics when processing malformed UL NAS Transport NAS messages without a Request Type.

Impact

An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required.

Fix

Add a guard when receiving an UL NAS Message without a Request Type given no SM Context.

Severity ?

6.5 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/ellanetworks/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33283"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-19T17:47:12Z",
    "nvd_published_at": "2026-03-24T00:16:30Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\nElla Core panics when processing malformed UL NAS Transport NAS messages without a Request Type.\n\n## Impact\nAn attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required.\n\n## Fix\nAdd a guard when receiving an UL NAS Message without a Request Type given no SM Context.",
  "id": "GHSA-3366-gw57-fcm5",
  "modified": "2026-03-25T21:33:00Z",
  "published": "2026-03-19T17:47:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33283"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ellanetworks/core"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Ella Core panics on malformed ULNASTransport Message without a Request Type"
}

CVE-2026-33283 (GCVE-0-2026-33283)

Vulnerability from cvelistv5 – Published: 2026-03-23 23:49 – Updated: 2026-03-24 15:12

Title

Ella Core panics on malformed ULNASTransport Message without a Request Type

Summary

Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing malformed UL NAS Transport NAS messages without a Request Type. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 adds a guard when receiving an UL NAS Message without a Request Type given no SM Context.

Severity ?

6.5 (Medium)


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

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M

References

URL

Tags

https://github.com/ellanetworks/core/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	ellanetworks	core	Affected: < 1.6.0

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33283",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-24T14:12:37.211448Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-24T15:12:39.668Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "core",
          "vendor": "ellanetworks",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.6.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing malformed UL NAS Transport NAS messages without a Request Type. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 adds a guard when receiving an UL NAS Message without a Request Type given no SM Context."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-23T23:49:42.539Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5"
        }
      ],
      "source": {
        "advisory": "GHSA-3366-gw57-fcm5",
        "discovery": "UNKNOWN"
      },
      "title": "Ella Core panics on malformed ULNASTransport Message without a Request Type"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33283",
    "datePublished": "2026-03-23T23:49:42.539Z",
    "dateReserved": "2026-03-18T18:55:47.425Z",
    "dateUpdated": "2026-03-24T15:12:39.668Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-3366-GW57-FCM5

Summary

Impact

Fix

CVE-2026-33283 (GCVE-0-2026-33283)

Tags

Sightings

Nomenclature