Vulnerability-Lookup

GHSA-F5WW-CQ3M-Q3G7

Vulnerability from github – Published: 2023-07-06 19:45 – Updated: 2023-07-06 19:45

Summary

Sanitize vulnerable to Cross-site Scripting via insufficient neutralization of `style` element content

Details

Impact

Using carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize >= 3.0.0, < 6.0.2 when Sanitize is configured to use the built-in "relaxed" config or when using a custom config that allows style elements and one or more CSS at-rules. This could result in XSS (cross-site scripting) or other undesired behavior when the malicious HTML and CSS are rendered in a browser.

Patches

Sanitize >= 6.0.2 performs additional escaping of CSS in style element content, which fixes this issue.

Workarounds

Users who are unable to upgrade can prevent this issue by using a Sanitize config that doesn't allow style elements, using a Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence </ as <\/ in style element content.

Credit

This issue was found by @cure53 during an audit of a project that uses Sanitize and was reported by one of that project's maintainers. Thank you!

Severity

7.1 (High)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "sanitize"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "6.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-36823"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-07-06T19:45:44Z",
    "nvd_published_at": "2023-07-06T16:15:10Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nUsing carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize `\u003e= 3.0.0, \u003c 6.0.2` when Sanitize is configured to use the built-in \"relaxed\" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in XSS (cross-site scripting) or other undesired behavior when the malicious HTML and CSS are rendered in a browser.\n\n### Patches\n\nSanitize `\u003e= 6.0.2` performs additional escaping of CSS in `style` element content, which fixes this issue.\n\n### Workarounds\n\nUsers who are unable to upgrade can prevent this issue by using a Sanitize config that doesn\u0027t allow `style` elements, using a Sanitize config that doesn\u0027t allow CSS at-rules, or by manually escaping the character sequence `\u003c/` as `\u003c\\/` in `style` element content.\n\n### Credit\n\nThis issue was found by @cure53 during an audit of a project that uses Sanitize and was reported by one of that project\u0027s maintainers. Thank you!",
  "id": "GHSA-f5ww-cq3m-q3g7",
  "modified": "2023-07-06T19:45:44Z",
  "published": "2023-07-06T19:45:44Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-36823"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rgrove/sanitize"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rgrove/sanitize/releases/tag/v6.0.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sanitize/CVE-2023-36823.yml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/11/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Sanitize vulnerable to Cross-site Scripting via insufficient neutralization of `style` element content"
}

CVE-2023-36823 (GCVE-0-2023-36823)

Vulnerability from cvelistv5 – Published: 2023-07-06 15:06 – Updated: 2025-02-13 16:56

Title

Sanitize vulnerable to Cross-site Scripting via insufficient neutralization of `style` element content

Summary

Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version 6.0.2 when Sanitize is configured to use the built-in "relaxed" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to upgrade can prevent this issue by using a Sanitize config that doesn't allow `style` elements, using a Sanitize config that doesn't allow CSS at-rules, or by manually escaping the character sequence `</` as `<\/` in `style` element content.

Severity

7.1 (High)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/rgrove/sanitize/security/advis…	x_refsource_CONFIRM
https://github.com/rgrove/sanitize/commit/76ed46e…	x_refsource_MISC
https://github.com/rgrove/sanitize/releases/tag/v6.0.2	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2023…

Impacted products

1 product

Vendor	Product	Version
rgrove	sanitize	Affected: >= 3.0.0, < 6.0.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T17:01:09.986Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7",
            "tags": [
              "x_refsource_CONFIRM",
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            ],
            "url": "https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7"
          },
          {
            "name": "https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220",
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220"
          },
          {
            "name": "https://github.com/rgrove/sanitize/releases/tag/v6.0.2",
            "tags": [
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            "url": "https://github.com/rgrove/sanitize/releases/tag/v6.0.2"
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          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/11/msg00008.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "sanitize",
          "vendor": "rgrove",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 6.0.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Sanitize is an allowlist-based HTML and CSS sanitizer. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML and CSS through Sanitize starting with version 3.0.0 and prior to version 6.0.2 when Sanitize is configured to use the built-in \"relaxed\" config or when using a custom config that allows `style` elements and one or more CSS at-rules. This could result in cross-site scripting or other undesired behavior when the malicious HTML and CSS are rendered in a browser. Sanitize 6.0.2 performs additional escaping of CSS in `style` element content, which fixes this issue. Users who are unable to upgrade can prevent this issue by using a Sanitize config that doesn\u0027t allow `style` elements, using a Sanitize config that doesn\u0027t allow CSS at-rules, or by manually escaping the character sequence `\u003c/` as `\u003c\\/` in `style` element content."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-11-14T16:06:27.928Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7",
          "tags": [
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          "url": "https://github.com/rgrove/sanitize/security/advisories/GHSA-f5ww-cq3m-q3g7"
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        {
          "name": "https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220",
          "tags": [
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          ],
          "url": "https://github.com/rgrove/sanitize/commit/76ed46e6dc70820f38efe27de8dabd54dddb5220"
        },
        {
          "name": "https://github.com/rgrove/sanitize/releases/tag/v6.0.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/rgrove/sanitize/releases/tag/v6.0.2"
        },
        {
          "url": "https://lists.debian.org/debian-lts-announce/2023/11/msg00008.html"
        }
      ],
      "source": {
        "advisory": "GHSA-f5ww-cq3m-q3g7",
        "discovery": "UNKNOWN"
      },
      "title": "Sanitize vulnerable to Cross-site Scripting via insufficient neutralization of `style` element content"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2023-36823",
    "datePublished": "2023-07-06T15:06:00.509Z",
    "dateReserved": "2023-06-27T15:43:18.386Z",
    "dateUpdated": "2025-02-13T16:56:27.159Z",
    "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.

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.

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