{
"id": "GHSA-hqxw-mm44-gc4r",
"aliases": [
"CVE-2021-39156"
],
"details": "### Impact\nIstio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. \n\n### Patches\n* Istio 1.11.1 and above\n* Istio 1.10.4 and above\n* Istio 1.9.8 and above\n\n### Workarounds\nA Lua filter may be written to normalize the path. This is similar to the Path normalization presented in the [Security Best Practices](https://istio.io/latest/docs/ops/best-practices/security/#case-normalization) guide.\n\n### References\nMore details can be found in the [Istio Security Bulletin](https://istio.io/latest/news/security/istio-security-2021-008)\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at [email protected] \n",
"summary": "Istio Fragments in Path May Lead to Authorization Policy Bypass",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.9.8"
}
]
}
],
"package": {
"name": "istio.io/istio",
"ecosystem": "Go"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.10.0"
},
{
"fixed": "1.10.4"
}
]
}
],
"package": {
"name": "istio.io/istio",
"ecosystem": "Go"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.11.0"
},
{
"fixed": "1.11.1"
}
]
}
],
"package": {
"name": "istio.io/istio",
"ecosystem": "Go"
},
"versions": [
"1.11.0"
]
}
],
"modified": "2022-08-15T20:04:30Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
}
],
"published": "2021-08-30T16:16:14Z",
"references": [
{
"url": "https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39156",
"type": "ADVISORY"
},
{
"url": "https://github.com/istio/istio",
"type": "PACKAGE"
},
{
"url": "https://istio.io/latest/news/security/istio-security-2021-008",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-706",
"CWE-863"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2021-08-24T23:15:00Z",
"github_reviewed_at": "2021-08-25T22:28:17Z"
}
}