Vulnerability-Lookup

OESA-2025-1930 (CVE-2025-6442)

Vulnerability from osv_openeuler – Published: 2025-08-01 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

ruby security update

Details

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl).

Security Fix(es):

Webrick is an open source HTTP server toolkit for The Ruby Programming Language. Webrick has an environmental problem vulnerability, which originates from the inconsistent parsing of HTTP header terminators by the read_headers method, which may lead to an HTTP request entrainment attack.(CVE-2025-6442)

Severity

6.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-6442	ADVISORY

JSON

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{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "ruby-2.5.8-135.oe2003sp4.aarch64.rpm",
          "ruby-debuginfo-2.5.8-135.oe2003sp4.aarch64.rpm",
          "ruby-debugsource-2.5.8-135.oe2003sp4.aarch64.rpm",
          "ruby-devel-2.5.8-135.oe2003sp4.aarch64.rpm",
          "rubygem-bigdecimal-1.3.4-135.oe2003sp4.aarch64.rpm",
          "rubygem-io-console-0.4.6-135.oe2003sp4.aarch64.rpm",
          "rubygem-json-2.1.0-135.oe2003sp4.aarch64.rpm",
          "rubygem-openssl-2.1.2-135.oe2003sp4.aarch64.rpm",
          "rubygem-psych-3.0.2-135.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "ruby-help-2.5.8-135.oe2003sp4.noarch.rpm",
          "ruby-irb-2.5.8-135.oe2003sp4.noarch.rpm",
          "rubygem-did_you_mean-1.2.0-135.oe2003sp4.noarch.rpm",
          "rubygem-minitest-5.10.3-135.oe2003sp4.noarch.rpm",
          "rubygem-net-telnet-0.1.1-135.oe2003sp4.noarch.rpm",
          "rubygem-power_assert-1.1.1-135.oe2003sp4.noarch.rpm",
          "rubygem-rake-12.3.0-135.oe2003sp4.noarch.rpm",
          "rubygem-rdoc-6.0.1.1-135.oe2003sp4.noarch.rpm",
          "rubygem-test-unit-3.2.7-135.oe2003sp4.noarch.rpm",
          "rubygem-xmlrpc-0.3.0-135.oe2003sp4.noarch.rpm",
          "rubygems-2.7.6-135.oe2003sp4.noarch.rpm",
          "rubygems-devel-2.7.6-135.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "ruby-2.5.8-135.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "ruby-2.5.8-135.oe2003sp4.x86_64.rpm",
          "ruby-debuginfo-2.5.8-135.oe2003sp4.x86_64.rpm",
          "ruby-debugsource-2.5.8-135.oe2003sp4.x86_64.rpm",
          "ruby-devel-2.5.8-135.oe2003sp4.x86_64.rpm",
          "rubygem-bigdecimal-1.3.4-135.oe2003sp4.x86_64.rpm",
          "rubygem-io-console-0.4.6-135.oe2003sp4.x86_64.rpm",
          "rubygem-json-2.1.0-135.oe2003sp4.x86_64.rpm",
          "rubygem-openssl-2.1.2-135.oe2003sp4.x86_64.rpm",
          "rubygem-psych-3.0.2-135.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "ruby",
        "purl": "pkg:rpm/openEuler/ruby\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.8-135.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl).\r\n\r\nSecurity Fix(es):\n\nWebrick is an open source HTTP server toolkit for The Ruby Programming Language.\n Webrick has an environmental problem vulnerability, which originates from the inconsistent parsing of HTTP header terminators by the read_headers method, which may lead to an HTTP request entrainment attack.(CVE-2025-6442)",
  "id": "OESA-2025-1930",
  "modified": "2026-08-06T11:09:01Z",
  "published": "2025-08-01T11:09:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1930"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6442"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ruby security update",
  "upstream": [
    "CVE-2025-6442"
  ]
}

CVE-2025-6442 (GCVE-0-2025-6442)

Vulnerability from cvelistv5 – Published: 2025-06-25 16:52 – Updated: 2025-06-25 20:42

Title

Ruby WEBrick read_header HTTP Request Smuggling Vulnerability

Summary

Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-CAN-21876.

Severity

6.5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-25 20:41 UTC

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Assigner

zdi mitre root

References

2 references

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory
https://github.com/ruby/webrick/commit/ee60354bcb…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Ruby	WEBrick	Affected: 1.8.1

Date Public

2025-06-23 14:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-6442",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-25T20:41:55.809442Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-25T20:42:41.093Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "WEBrick",
          "vendor": "Ruby",
          "versions": [
            {
              "status": "affected",
              "version": "1.8.1"
            }
          ]
        }
      ],
      "dateAssigned": "2025-06-20T17:14:36.683Z",
      "datePublic": "2025-06-23T14:00:39.708Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is deployed behind an HTTP proxy that fulfills specific conditions.\n\nThe specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-CAN-21876."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.0"
          },
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
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              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2025-06-25T16:52:24.625Z",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "name": "ZDI-25-414",
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          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-414/"
        },
        {
          "name": "vendor-provided URL",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/ruby/webrick/commit/ee60354bcb84ec33b9245e1d1aa6e1f7e8132101#diff-ad02984d873efb089aa51551bc6b7d307a53e0ba1ac439e91d69c2e58a478864"
        }
      ],
      "source": {
        "lang": "en",
        "value": "yadhukrishnam"
      },
      "title": "Ruby WEBrick read_header HTTP Request Smuggling Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
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    "datePublished": "2025-06-25T16:52:24.625Z",
    "dateReserved": "2025-06-20T17:14:36.566Z",
    "dateUpdated": "2025-06-25T20:42:41.093Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

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.