ghsa-f5ww-cq3m-q3g7
Vulnerability from github
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!
{
"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"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.