FKIE_CVE-2026-0708

Vulnerability from fkie_nvd - Published: 2026-03-17 04:16 - Updated: 2026-05-11 17:14
Severity ?
8.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
A flaw was found in libucl. A remote attacker could exploit this by providing a specially crafted Universal Configuration Language (UCL) input that contains a key with an embedded null byte. This can cause a segmentation fault (SEGV fault) in the `ucl_object_emit` function when parsing and emitting the object, leading to a Denial of Service (DoS) for the affected system.
References
patrick@puiterwijk.orghttps://access.redhat.com/security/cve/CVE-2026-0708Third Party Advisory
patrick@puiterwijk.orghttps://bugzilla.redhat.com/show_bug.cgi?id=2427770Third Party Advisory, Issue Tracking
patrick@puiterwijk.orghttps://github.com/vstakhov/libucl/issues/323Issue Tracking, Vendor Advisory, Exploit
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/vstakhov/libucl/issues/323Issue Tracking, Vendor Advisory, Exploit
Impacted products
Vendor Product Version
vstakhov libucl *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:vstakhov:libucl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C9FF5B7E-8AFB-438D-A407-EC4664ED380A",
              "versionEndIncluding": "0.9.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libucl. A remote attacker could exploit this by providing a specially crafted Universal Configuration Language (UCL) input that contains a key with an embedded null byte. This can cause a segmentation fault (SEGV fault) in the `ucl_object_emit` function when parsing and emitting the object, leading to a Denial of Service (DoS) for the affected system."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo en libucl. Un atacante remoto podr\u00eda explotar esto al proporcionar una entrada de Universal Configuration Language (UCL) especialmente dise\u00f1ada que contiene una clave con un byte nulo incrustado. Esto puede causar un fallo de segmentaci\u00f3n (fallo SEGV) en la funci\u00f3n \u0027ucl_object_emit\u0027 al analizar y emitir el objeto, lo que lleva a una denegaci\u00f3n de servicio (DoS) para el sistema afectado."
    }
  ],
  "id": "CVE-2026-0708",
  "lastModified": "2026-05-11T17:14:50.693",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.5,
        "source": "patrick@puiterwijk.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-17T04:16:07.750",
  "references": [
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-0708"
    },
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Third Party Advisory",
        "Issue Tracking"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427770"
    },
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory",
        "Exploit"
      ],
      "url": "https://github.com/vstakhov/libucl/issues/323"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory",
        "Exploit"
      ],
      "url": "https://github.com/vstakhov/libucl/issues/323"
    }
  ],
  "sourceIdentifier": "patrick@puiterwijk.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "patrick@puiterwijk.org",
      "type": "Secondary"
    }
  ]
}


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