原始 OSV JSON
{
"id": "GHSA-m6xf-fq7q-8743",
"aliases": [
"CVE-2020-6816"
],
"details": "### Impact\n\nA [mutation XSS](https://cure53.de/fp170.pdf) affects users calling `bleach.clean` with all of:\n\n* the `svg` or `math` in the allowed/whitelisted tags\n* an RCDATA tag (see below) in the allowed/whitelisted tags\n* the keyword argument `strip=False`\n\n### Patches\n\nUsers are encouraged to upgrade to bleach v3.1.2 or greater.\n\n### Workarounds\n\n* modify `bleach.clean` calls to use `strip=True`, or not whitelist `math` or `svg` tags and one or more of the following tags:\n\n```\nscript\nnoscript\nstyle\nnoframes\nxmp\nnoembed\niframe\n```\n\n* A strong [Content-Security-Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) without `unsafe-inline` and `unsafe-eval` [`script-src`s](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/script-src)) will also help mitigate the risk.\n\n### References\n\n* https://bugzilla.mozilla.org/show_bug.cgi?id=1621692\n* https://cure53.de/fp170.pdf\n* https://nvd.nist.gov/vuln/detail/CVE-2020-6816\n* https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach\n\n### Credits\n\n* Reported by [Yaniv Nizry](https://twitter.com/ynizry) from the CxSCA AppSec group at Checkmarx\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue at [https://github.com/mozilla/bleach/issues](https://github.com/mozilla/bleach/issues)\n* Email us at [[email protected]](mailto:[email protected])",
"summary": "Bleach vulnerable to mutation XSS via whitelisted math or svg and raw tag",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.2"
}
]
}
],
"package": {
"name": "bleach",
"ecosystem": "PyPI"
}
}
],
"modified": "2024-09-12T20:49:31Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
}
],
"published": "2020-03-24T15:06:32Z",
"references": [
{
"url": "https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-6816",
"type": "ADVISORY"
},
{
"url": "https://advisory.checkmarx.net/advisory/CX-2020-4277",
"type": "WEB"
},
{
"url": "https://github.com/mozilla/bleach",
"type": "PACKAGE"
},
{
"url": "https://github.com/mozilla/bleach/releases/tag/v3.1.2",
"type": "WEB"
},
{
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/bleach/PYSEC-2020-28.yaml",
"type": "WEB"
},
{
"url": "https://lists.fedoraproject.org/archives/list/[email protected]/message/EDQU2SZLZMSSACCBUBJ6NOSRNNBDYFW5",
"type": "WEB"
},
{
"url": "https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2020-03-24T22:15:00Z",
"github_reviewed_at": "2020-03-23T22:25:38Z"
}
}