ghsa-462w-v97r-4m45
Vulnerability from github
Published
2019-04-10 14:30
Modified
2023-08-30 21:01
Severity
Summary
Jinja2 sandbox escape via string formatting
Details
In Pallets Jinja before 2.10.1, str.format_map allows a sandbox escape.
The sandbox is used to restrict what code can be evaluated when rendering untrusted, user-provided templates. Due to the way string formatting works in Python, the str.format_map method could be used to escape the sandbox.
This issue was previously addressed for the str.format method in Jinja 2.8.1, which discusses the issue in detail. However, the less-common str.format_map method was overlooked. This release applies the same sandboxing to both methods.
If you cannot upgrade Jinja, you can override the is_safe_attribute method on the sandbox and explicitly disallow the format_map method on string objects.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "Jinja2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.10.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-10906"
],
"database_specific": {
"cwe_ids": [
"CWE-693"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T20:57:35Z",
"nvd_published_at": "2019-04-07T00:29:00Z",
"severity": "HIGH"
},
"details": "In Pallets Jinja before 2.10.1, `str.format_map` allows a sandbox escape.\n\nThe sandbox is used to restrict what code can be evaluated when rendering untrusted, user-provided templates. Due to the way string formatting works in Python, the `str.format_map` method could be used to escape the sandbox.\n\nThis issue was previously addressed for the `str.format` method in Jinja 2.8.1, which discusses the issue in detail. However, the less-common `str.format_map` method was overlooked. This release applies the same sandboxing to both methods.\n\nIf you cannot upgrade Jinja, you can override the `is_safe_attribute` method on the sandbox and explicitly disallow the `format_map` method on string objects.",
"id": "GHSA-462w-v97r-4m45",
"modified": "2023-08-30T21:01:31Z",
"published": "2019-04-10T14:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-10906"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4011-2"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4011-1"
},
{
"type": "WEB",
"url": "https://palletsprojects.com/blog/jinja-2-10-1-released"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TS7IVZAJBWOHNRDMFJDIZVFCMRP6YIUQ"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QCDYIS254EJMBNWOG4S5QY6AOTOR4TZU"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DSW3QZMFVVR7YE3UT4YRQA272TYAL5AF"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/f0c4a03418bcfe70c539c5dbaf99c04c98da13bfa1d3266f08564316@%3Ccommits.airflow.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/b2380d147b508bbcb90d2cad443c159e63e12555966ab4f320ee22da@%3Ccommits.airflow.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/7f39f01392d320dfb48e4901db68daeece62fd60ef20955966739993@%3Ccommits.airflow.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/57673a78c4d5c870d3f21465c7e2946b9f8285c7c57e54c2ae552f02@%3Ccommits.airflow.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/46c055e173b52d599c648a98199972dbd6a89d2b4c4647b0500f2284@%3Cdevnull.infra.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/320441dccbd9a545320f5f07306d711d4bbd31ba43dc9eebcfc602df@%3Cdevnull.infra.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/2b52b9c8b9d6366a4f1b407a8bde6af28d9fc73fdb3b37695fd0d9ac@%3Cdevnull.infra.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/09fc842ff444cd43d9d4c510756fec625ef8eb1175f14fd21de2605f@%3Cdevnull.infra.apache.org%3E"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-462w-v97r-4m45"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:1329"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:1237"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:1152"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00030.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00064.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Jinja2 sandbox escape via string formatting"
}
Loading...