Vulnerability-Lookup

CVE-2025-9648 (GCVE-0-2025-9648)

Vulnerability from cvelistv5 – Published: 2025-09-29 11:47 – Updated: 2025-09-29 12:53 X_Open Source

Title

Denial of Service in CivetWeb

Summary

A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests. This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.

Severity

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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-29 12:53 UTC

CWE

CWE-158 - Improper Neutralization of Null Byte or NUL Character

Assigner

CERT-PL ENISA root

References

4 references

URL	Tags
https://cert.pl/en/posts/2025/09/CVE-2025-9648	third-party-advisory
https://github.com/civetweb/civetweb	product
https://github.com/civetweb/civetweb/issues/1348	issue-tracking
https://github.com/civetweb/civetweb/commit/782e1…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
CivetWeb	CivetWeb	Unaffected: 0 , < 1.08 (semver) Unknown: 1.08 , < 1.10 (semver) Affected: 1.10 , ≤ 1.16 (semver)	guessed

Date Public

2025-09-29 09:55

Credits

Artur Łącki

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-9648

Vulnerability from fkie_nvd - Published: 2025-09-29 12:15 - Updated: 2026-06-17 10:09

Severity

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

Summary

References

	URL	Tags
	cvd@cert.pl	https://cert.pl/en/posts/2025/09/CVE-2025-9648
	cvd@cert.pl	https://github.com/civetweb/civetweb
	cvd@cert.pl	https://github.com/civetweb/civetweb/commit/782e18903515f43bafbf2e668994e82bdfa51133
	cvd@cert.pl	https://github.com/civetweb/civetweb/issues/1348

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "source": "cvd@cert.pl",
      "url": "https://github.com/civetweb/civetweb/commit/782e18903515f43bafbf2e668994e82bdfa51133"
    },
    {
      "source": "cvd@cert.pl",
      "url": "https://github.com/civetweb/civetweb/issues/1348"
    }
  ],
  "sourceIdentifier": "cvd@cert.pl",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-158"
        }
      ],
      "source": "cvd@cert.pl",
      "type": "Secondary"
    }
  ]
}

GHSA-2GXG-PVM2-2P6X

Vulnerability from github – Published: 2025-09-29 12:30 – Updated: 2025-09-29 12:30

Details

This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.

Severity

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-2025-9648"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-158"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-29T12:15:49Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the CivetWeb library\u0027s function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests.\n\nThis issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.",
  "id": "GHSA-2gxg-pvm2-2p6x",
  "modified": "2025-09-29T12:30:27Z",
  "published": "2025-09-29T12:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9648"
    },
    {
      "type": "WEB",
      "url": "https://github.com/civetweb/civetweb/issues/1348"
    },
    {
      "type": "WEB",
      "url": "https://github.com/civetweb/civetweb/commit/782e18903515f43bafbf2e668994e82bdfa51133"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/en/posts/2025/09/CVE-2025-9648"
    },
    {
      "type": "WEB",
      "url": "https://github.com/civetweb/civetweb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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"
    }
  ]
}

MSRC_CVE-2025-9648

Vulnerability from csaf_microsoft - Published: 2025-09-02 00:00 - Updated: 2025-10-03 01:01

Summary

Denial of Service in CivetWeb

Scope

1 vulnerability in this advisory, including CVE-2025-9648.

CVE-2025-9648

Fixed: 2 products Known affected: 2 products

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

RHSA-2025:21929

Vulnerability from csaf_redhat - Published: 2025-11-24 08:28 - Updated: 2026-09-06 04:55

Summary

Red Hat Security Advisory: RHSA 4.9.1 security and bug fix update

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2025-9648.

CVE-2025-9648

A denial of service flaw has been discovered in CivetWeb. The mg_handle_form_request function allows attackers to trigger a denial of service (DoS) condition by sending a specially crafted HTTP POST request containing a null byte in the payload. The server enters an infinite loop during form data parsing as a result. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests.

5.3 (Medium)


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

Fixed: 4 products Known not affected: 41 products

https://access.redhat.com/errata/RHSA-2025:21929

Open the full advisory

RHSA-2025:22179

Vulnerability from csaf_redhat - Published: 2025-11-26 13:57 - Updated: 2026-09-10 04:04

Summary

Red Hat Security Advisory: RHSA 4.8.6 security and bug fix update

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2025-9648.

CVE-2025-9648

5.3 (Medium)


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

Fixed: 4 products Known not affected: 41 products

https://access.redhat.com/errata/RHSA-2025:22179

Open the full advisory

RHSA-2025:23248

Vulnerability from csaf_redhat - Published: 2025-12-16 08:28 - Updated: 2026-09-10 09:55

Summary

Red Hat Security Advisory: RHSA 4.7.9 security and bug fix update

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2025-9648.

CVE-2025-9648

5.3 (Medium)


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

Fixed: 4 products Known not affected: 41 products

https://access.redhat.com/errata/RHSA-2025:23248

Open the full advisory

ubuntu-cve-2025-9648

Vulnerability from osv_ubuntu

Published

2025-09-29 12:15

Modified

2026-09-14 08:22

Summary

Details

Severity

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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-9648	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-9648	REPORT
	https://github.com/civetweb/civetweb/issues/1348	REPORT
	https://github.com/civetweb/civetweb/commit/782e1…	REPORT
	https://cert.pl/en/posts/2025/09/CVE-2025-9648	REPORT
	https://github.com/civetweb/civetweb	REPORT
	https://ubuntu.com/security/notices/USN-8749-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.15+dfsg-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.15+dfsg-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.15+dfsg-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.15+dfsg-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.13+dfsg-5",
        "1.15+dfsg-1",
        "1.15+dfsg-3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.16+dfsg-1ubuntu0.1"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.16+dfsg-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.16+dfsg-1ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16+dfsg-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16+dfsg-1",
        "1.16+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.16+dfsg-2"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.16+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.16+dfsg-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "civetweb",
            "binary_version": "1.16+dfsg-3ubuntu0.1"
          },
          {
            "binary_name": "libcivetweb1",
            "binary_version": "1.16+dfsg-3ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "civetweb",
        "purl": "pkg:deb/ubuntu/civetweb@1.16+dfsg-3ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16+dfsg-3ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16+dfsg-2",
        "1.16+dfsg-3"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability in the CivetWeb library\u0027s function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests. This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.",
  "id": "UBUNTU-CVE-2025-9648",
  "modified": "2026-09-14T08:22:59Z",
  "published": "2025-09-29T12:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-9648"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-9648"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/civetweb/civetweb/issues/1348"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/civetweb/civetweb/commit/782e18903515f43bafbf2e668994e82bdfa51133"
    },
    {
      "type": "REPORT",
      "url": "https://cert.pl/en/posts/2025/09/CVE-2025-9648"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/civetweb/civetweb"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8749-1"
    }
  ],
  "related": [
    "USN-8749-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-9648"
  ]
}

WID-SEC-W-2025-2668

Vulnerability from csaf_certbund - Published: 2025-11-24 23:00 - Updated: 2025-12-15 23:00

Summary

Red Hat Enterprise Linux (CivetWeb library): Schwachstelle ermöglicht Denial of Service

Severity

Mittel

Scope

1 vulnerability in this advisory, including CVE-2025-9648.

CVE-2025-9648

Known affected: 2 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.

Action not permitted

CVE-2025-9648 (GCVE-0-2025-9648)

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature