Vulnerability-Lookup

CVE-2018-25103 (GCVE-0-2018-25103)

Vulnerability from cvelistv5 – Published: 2024-06-17 18:02 – Updated: 2025-09-15 20:05

Title

Use-after-free vulnerabilities in lighttpd <= 1.4.50

Summary

There exists use-after-free vulnerabilities in lighttpd <= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-15 20:05 UTC

CWE

CWE-416 - Use After Free

Assigner

certcc mitre root Scorecard

References

6 references

URL	Tags
https://blogvdoo.wordpress.com/2018/11/06/giving-…
https://www.runzero.com/blog/lighttpd/
https://github.com/lighttpd/lighttpd1.4/commit/df…
https://github.com/lighttpd/lighttpd1.4/commit/d1…
https://9443417.fs1.hubspotusercontent-na1.net/hu…
https://www.kb.cert.org/vuls/id/312260

Impacted products

2 products

Vendor	Product	Version
lighttpd	lighttpd	Affected: * , ≤ 1.4.50 (custom)
lighttpd	lighttpd	Affected: 0 , ≤ 1.4.50 (custom) cpe:2.3:a:lighttpd:lighttpd::::::::

Credits

Thanks to VDOO Embedded Security part of JFROG for reporting the vulnerability in the If-Modified-Since header with line folding, and thanks to Marcus Wengelin for reporting the vulnerability in the Range header with a specially crafted pair of Range headers.

Show details on NVD website

JSON

To clipboard

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}

EUVD-2026-252742

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 06:57

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T06:57:49.341786+00:00",
  "id": "EUVD-2026-252742"
}

FKIE_CVE-2018-25103

Vulnerability from fkie_nvd - Published: 2024-06-17 18:15 - Updated: 2026-06-17 01:54

Severity

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

Summary

There exists use-after-free vulnerabilities in lighttpd <= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests.

References

	URL	Tags
	cret@cert.org	https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf
	cret@cert.org	https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736
	cret@cert.org	https://github.com/lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8
	cret@cert.org	https://github.com/lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9
	cret@cert.org	https://www.kb.cert.org/vuls/id/312260
	cret@cert.org	https://www.runzero.com/blog/lighttpd/
	af854a3a-2127-422b-91ae-364da2661108	https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf
	af854a3a-2127-422b-91ae-364da2661108	https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9
	af854a3a-2127-422b-91ae-364da2661108	https://www.kb.cert.org/vuls/id/312260
	af854a3a-2127-422b-91ae-364da2661108	https://www.runzero.com/blog/lighttpd/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "lighttpd",
          "vendor": "lighttpd",
          "versions": [
            {
              "lessThanOrEqual": "1.4.50",
              "status": "affected",
              "version": "*",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:lighttpd:lighttpd:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "lighttpd",
          "vendor": "lighttpd",
          "versions": [
            {
              "lessThanOrEqual": "1.4.50",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "There exists use-after-free vulnerabilities in lighttpd \u003c= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests."
    },
    {
      "lang": "es",
      "value": "Existen vulnerabilidades de uso despu\u00e9s de liberaci\u00f3n en el an\u00e1lisis de solicitudes de lighttpd \u0026lt;= 1.4.50 que podr\u00edan leer de punteros inv\u00e1lidos a memoria utilizada en la misma solicitud, no de otras solicitudes."
    }
  ],
  "id": "CVE-2018-25103",
  "lastModified": "2026-06-17T01:54:43.473",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2018-25103",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-09-15T20:05:27.032213Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-06-17T18:15:12.650",
  "references": [
    {
      "source": "cret@cert.org",
      "url": "https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf"
    },
    {
      "source": "cret@cert.org",
      "url": "https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736"
    },
    {
      "source": "cret@cert.org",
      "url": "https://github.com/lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8"
    },
    {
      "source": "cret@cert.org",
      "url": "https://github.com/lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9"
    },
    {
      "source": "cret@cert.org",
      "url": "https://www.kb.cert.org/vuls/id/312260"
    },
    {
      "source": "cret@cert.org",
      "url": "https://www.runzero.com/blog/lighttpd/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.kb.cert.org/vuls/id/312260"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.runzero.com/blog/lighttpd/"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Deferred"
}

GHSA-844M-HQ7R-WXC8

Vulnerability from github – Published: 2024-06-17 18:31 – Updated: 2024-07-09 18:30

Details

There exists a use-after-free-vulnerability in lighttpd <= 1.4.50 that can allow access to do a case-insensitive comparison against the reused pointer.

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2018-25103"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-17T18:15:12Z",
    "severity": "MODERATE"
  },
  "details": "There exists a use-after-free-vulnerability in lighttpd \u003c= 1.4.50 that can allow access to do a case-insensitive comparison against the reused pointer.",
  "id": "GHSA-844m-hq7r-wxc8",
  "modified": "2024-07-09T18:30:42Z",
  "published": "2024-06-17T18:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-25103"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lighttpd/lighttpd1.4/commit/d161f53de04bc826ce1bdaeb3dce2c72ca50a3f8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lighttpd/lighttpd1.4/commit/df8e4f95614e476276a55e34da2aa8b00b1148e9"
    },
    {
      "type": "WEB",
      "url": "https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf"
    },
    {
      "type": "WEB",
      "url": "https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736"
    },
    {
      "type": "WEB",
      "url": "https://www.binarly.io/blog/lighttpd-gains-new-life"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/312260"
    },
    {
      "type": "WEB",
      "url": "https://www.runzero.com/blog/lighttpd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

UBUNTU-CVE-2018-25103 (CVE-2018-25103)

Vulnerability from osv_ubuntu – Published: 2024-06-17 18:15 – Updated: 2026-04-22 07:38 – Source website

Details

There exists use-after-free vulnerabilities in lighttpd <= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests.

Severity

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2018-25103	REPORT
	https://www.cve.org/CVERecord?id=CVE-2018-25103	REPORT
	https://www.runzero.com/blog/lighttpd/	REPORT
	https://www.binarly.io/blog/lighttpd-gains-new-life	REPORT
	https://9443417.fs1.hubspotusercontent-na1.net/hu…	REPORT
	https://blogvdoo.wordpress.com/2018/11/06/giving-…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "lighttpd",
            "binary_version": "1.4.33-1+nmu2ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-cml",
            "binary_version": "1.4.33-1+nmu2ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-magnet",
            "binary_version": "1.4.33-1+nmu2ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-mysql-vhost",
            "binary_version": "1.4.33-1+nmu2ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-trigger-b4-dl",
            "binary_version": "1.4.33-1+nmu2ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-webdav",
            "binary_version": "1.4.33-1+nmu2ubuntu2.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "lighttpd",
        "purl": "pkg:deb/ubuntu/lighttpd@1.4.33-1+nmu2ubuntu2.1+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.31-3ubuntu3",
        "1.4.33-1ubuntu1",
        "1.4.33-1+nmu2ubuntu1",
        "1.4.33-1+nmu2ubuntu2",
        "1.4.33-1+nmu2ubuntu2.1",
        "1.4.33-1+nmu2ubuntu2.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "lighttpd",
            "binary_version": "1.4.35-4ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-cml",
            "binary_version": "1.4.35-4ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-magnet",
            "binary_version": "1.4.35-4ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-mysql-vhost",
            "binary_version": "1.4.35-4ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-trigger-b4-dl",
            "binary_version": "1.4.35-4ubuntu2.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-webdav",
            "binary_version": "1.4.35-4ubuntu2.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "lighttpd",
        "purl": "pkg:deb/ubuntu/lighttpd@1.4.35-4ubuntu2.1+esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.35-4ubuntu1",
        "1.4.35-4ubuntu2",
        "1.4.35-4ubuntu2.1",
        "1.4.35-4ubuntu2.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "lighttpd",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-authn-gssapi",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-authn-ldap",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-authn-mysql",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-cml",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-geoip",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-magnet",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-mysql-vhost",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-trigger-b4-dl",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          },
          {
            "binary_name": "lighttpd-mod-webdav",
            "binary_version": "1.4.45-1ubuntu3.18.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "lighttpd",
        "purl": "pkg:deb/ubuntu/lighttpd@1.4.45-1ubuntu3.18.04.1+esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.45-1ubuntu1",
        "1.4.45-1ubuntu3",
        "1.4.45-1ubuntu3+esm1",
        "1.4.45-1ubuntu3.18.04",
        "1.4.45-1ubuntu3.18.04+esm1",
        "1.4.45-1ubuntu3.18.04.1",
        "1.4.45-1ubuntu3.18.04.1+esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "There exists use-after-free vulnerabilities in lighttpd \u003c= 1.4.50 request parsing which might read from invalid pointers to memory used in the same request, not from other requests.",
  "id": "UBUNTU-CVE-2018-25103",
  "modified": "2026-04-22T07:38:48Z",
  "published": "2024-06-17T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-25103"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-25103"
    },
    {
      "type": "REPORT",
      "url": "https://www.runzero.com/blog/lighttpd/"
    },
    {
      "type": "REPORT",
      "url": "https://www.binarly.io/blog/lighttpd-gains-new-life"
    },
    {
      "type": "REPORT",
      "url": "https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2024/AMI-SA-2024002.pdf"
    },
    {
      "type": "REPORT",
      "url": "https://blogvdoo.wordpress.com/2018/11/06/giving-back-securing-open-source-iot-projects/#more-736"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-25103"
  ]
}

WID-SEC-W-2024-1563

Vulnerability from csaf_certbund - Published: 2024-07-09 22:00 - Updated: 2024-07-09 22:00

Summary

lighttpd: Schwachstelle ermöglicht Denial of Service und Informationsoffenlegung

Severity

Hoch

Scope

1 vulnerability in this advisory, including CVE-2018-25103.

CVE-2018-25103

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.

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.

Related by attack behaviour

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-2018-25103 (GCVE-0-2018-25103)

EUVD-2026-252742

FKIE_CVE-2018-25103

GHSA-844M-HQ7R-WXC8

UBUNTU-CVE-2018-25103 (CVE-2018-25103)

WID-SEC-W-2024-1563

Tags

Sightings

Nomenclature

Related by attack behaviour