github - ghsa-gr2g-vmxj-5cv8

GHSA-GR2G-VMXJ-5CV8

Vulnerability from github – Published: 2025-10-16 03:30 – Updated: 2025-10-16 15:30

Details

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.

Severity ?

6.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-11683"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-16T01:15:32Z",
    "severity": "MODERATE"
  },
  "details": "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": "GHSA-gr2g-vmxj-5cv8",
  "modified": "2025-10-16T15:30:42Z",
  "published": "2025-10-16T03:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-11683"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cpan-authors/YAML-Syck/pull/65"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/dist/YAML-Syck/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-11683 (GCVE-0-2025-11683)

Vulnerability from cvelistv5 – Published: 2025-10-16 00:14 – Updated: 2025-10-16 13:42

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.

Severity ?

6.5 (Medium)


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

CWE

CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Assigner

CPANSec

References

URL

Tags

	https://github.com/cpan-authors/YAML-Syck/pull/65	patch
	https://metacpan.org/dist/YAML-Syck/changes	release-notes

Impacted products

	Vendor	Product	Version
	TODDR	YAML::Syck	Affected: 0 , < 1.36 (custom)

Show details on NVD website

JSON

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        "metrics": [
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              "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",
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                "timestamp": "2025-10-16T13:41:01.868545Z",
                "version": "2.0.3"
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          "defaultStatus": "unaffected",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-GR2G-VMXJ-5CV8

CVE-2025-11683 (GCVE-0-2025-11683)

Tags

Sightings

Nomenclature