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GHSA-9h9g-93gc-623h.json
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GHSA-9h9g-93gc-623h.json
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{
"schema_version": "1.4.0",
"id": "GHSA-9h9g-93gc-623h",
"modified": "2022-12-17T00:32:41Z",
"published": "2022-12-13T17:50:25Z",
"aliases": [
"CVE-2022-23519"
],
"summary": "Possible XSS vulnerability with certain configurations of rails-html-sanitizer",
"details": "## Summary\n\nThere is a possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer.\n\n- Versions affected: ALL\n- Not affected: NONE\n- Fixed versions: 1.4.4\n\n\n## Impact\n\nA possible XSS vulnerability with certain configurations of Rails::Html::Sanitizer may allow an attacker to inject content if the application developer has overridden the sanitizer's allowed tags in either of the following ways:\n\n- allow both \"math\" and \"style\" elements,\n- or allow both \"svg\" and \"style\" elements\n\nCode is only impacted if allowed tags are being overridden. Applications may be doing this in four different ways:\n\n1. using application configuration:\n\n ```ruby\n # In config/application.rb\n config.action_view.sanitized_allowed_tags = [\"math\", \"style\"]\n # or\n config.action_view.sanitized_allowed_tags = [\"svg\", \"style\"]\n ```\n\n see https://guides.rubyonrails.org/configuring.html#configuring-action-view\n\n2. using a `:tags` option to the Action View helper `sanitize`:\n\n ```\n <%= sanitize @comment.body, tags: [\"math\", \"style\"] %>\n <%# or %>\n <%= sanitize @comment.body, tags: [\"svg\", \"style\"] %>\n ```\n\n see https://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#method-i-sanitize\n\n3. using Rails::Html::SafeListSanitizer class method `allowed_tags=`:\n\n ```ruby\n # class-level option\n Rails::Html::SafeListSanitizer.allowed_tags = [\"math\", \"style\"]\n # or\n Rails::Html::SafeListSanitizer.allowed_tags = [\"svg\", \"style\"]\n ```\n\n4. using a `:tags` options to the Rails::Html::SafeListSanitizer instance method `sanitize`:\n\n ```ruby\n # instance-level option\n Rails::Html::SafeListSanitizer.new.sanitize(@article.body, tags: [\"math\", \"style\"])\n # or\n Rails::Html::SafeListSanitizer.new.sanitize(@article.body, tags: [\"svg\", \"style\"])\n ```\n\nAll users overriding the allowed tags by any of the above mechanisms to include ((\"math\" or \"svg\") and \"style\") should either upgrade or use one of the workarounds immediately.\n\n\n## Workarounds\n\nRemove \"style\" from the overridden allowed tags, or remove \"math\" and \"svg\" from the overridden allowed tags.\n\n\n## References\n\n- [CWE - CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (4.9)](https://cwe.mitre.org/data/definitions/79.html)\n- https://hackerone.com/reports/1656627\n\n\n## Credit\n\nThis vulnerability was responsibly reported by Dominic Breuker.\n",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "rails-html-sanitizer"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.4"
}
]
}
]
}
],
"references": [
{
"type": "WEB",
"url": "https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-9h9g-93gc-623h"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23519"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/1656627"
},
{
"type": "PACKAGE",
"url": "https://github.com/rails/rails-html-sanitizer"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2022-23519.yml"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html"
}
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "MODERATE",
"github_reviewed": true,
"github_reviewed_at": "2022-12-13T17:50:25Z",
"nvd_published_at": "2022-12-14T17:15:00Z"
}
}