FKIE_CVE-2025-11683

Vulnerability from fkie_nvd - Published: 2025-10-16 01:15 - Updated: 2026-03-09 15:05
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values.  There is no indication that the issue leads to accessing memory outside that allocated to the module.
References
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/cpan-authors/YAML-Syck/pull/65Issue Tracking
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://metacpan.org/dist/YAML-Syck/changesProduct, Release Notes
Impacted products
Vendor Product Version
toddr yaml\ \
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:toddr:yaml\\:\\:syck:*:*:*:*:*:perl:*:*",
              "matchCriteriaId": "A2B7A1EA-2180-4708-BB3B-A14CD7F2ECF9",
              "versionEndExcluding": "1.36",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure\n\nMissing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read\n\nThe issue is seen with complex YAML files with a hash of all keys and empty values.\u00a0 There is no indication that the issue leads to accessing memory outside that allocated to the module."
    }
  ],
  "id": "CVE-2025-11683",
  "lastModified": "2026-03-09T15:05:36.383",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-10-16T01:15:32.890",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/cpan-authors/YAML-Syck/pull/65"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://metacpan.org/dist/YAML-Syck/changes"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}


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