Vulnerability-Lookup

alsa-2025:9330

Vulnerability from osv_almalinux

Published

2025-06-23 00:00

Modified

2025-07-03 08:23

Summary

Important: perl-YAML-LibYAML security update

Details

Kirill Siminov's "libyaml" is arguably the best YAML implementation. The C library is written precisely to the YAML 1.1 specification. It was originally bound to Python and was later bound to Ruby.

Security Fix(es):

yaml-libyaml: LibYAML Perl File Modification Vulnerability (CVE-2025-40908)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "perl-YAML-LibYAML"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:0.82-6.1.el9_6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Kirill Siminov\u0027s \"libyaml\" is arguably the best YAML implementation. The C library is written precisely to the YAML 1.1 specification. It was originally bound to Python and was later bound to Ruby.  \n\nSecurity Fix(es):  \n\n  * yaml-libyaml: LibYAML Perl File Modification Vulnerability (CVE-2025-40908)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2025:9330",
  "modified": "2025-07-03T08:23:21Z",
  "published": "2025-06-23T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2025:9330"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-40908"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2369630"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2025-9330.html"
    }
  ],
  "related": [
    "CVE-2025-40908"
  ],
  "summary": "Important: perl-YAML-LibYAML security update"
}

CVE-2025-40908 (GCVE-0-2025-40908)

Vulnerability from cvelistv5 – Published: 2025-06-01 13:41 – Updated: 2025-06-02 03:22

Title

YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

Summary

YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

Severity ?

9.1 (Critical)


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

CWE

CWE-552 - Files or Directories Accessible to External Parties

Assigner

CPANSec

References

URL

Tags

	https://github.com/ingydotnet/yaml-libyaml-pm/iss…	issue-tracking
	https://github.com/ingydotnet/yaml-libyaml-pm/pull/121	patch
	https://github.com/ingydotnet/yaml-libyaml-pm/pull/122	patch

Impacted products

	Vendor	Product	Version
	TINITA	YAML::LibYAML	Affected: 0 , < 0.903.0 (custom)

Credits

@shlomif (Shlomi Fish)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-40908",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-02T03:22:02.219115Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-02T03:22:25.333Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "YAML-LibYAML",
          "product": "YAML::LibYAML",
          "programFiles": [
            "lib/YAML/XS.pm"
          ],
          "repo": "https://github.com/ingydotnet/yaml-libyaml-pm",
          "vendor": "TINITA",
          "versions": [
            {
              "lessThan": "0.903.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "@shlomif (Shlomi Fish)"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified\u003cbr\u003e"
            }
          ],
          "value": "YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-23",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-23 File Content Injection"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-552",
              "description": "CWE-552 Files or Directories Accessible to External Parties",
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-01T13:41:48.168Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
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          ],
          "url": "https://github.com/ingydotnet/yaml-libyaml-pm/issues/120"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/ingydotnet/yaml-libyaml-pm/pull/121"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/ingydotnet/yaml-libyaml-pm/pull/122"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2025-40908",
    "datePublished": "2025-06-01T13:41:48.168Z",
    "dateReserved": "2025-04-16T09:05:34.360Z",
    "dateUpdated": "2025-06-02T03:22:25.333Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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