Vulnerability from bitnami_vulndb
It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16.
Workaround: >= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "mongodb",
"purl": "pkg:bitnami/mongodb"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0"
},
{
"fixed": "4.2.16"
},
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.11"
},
{
"introduced": "5.0.0"
},
{
"fixed": "5.0.4"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2021-32040"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*"
],
"severity": "High"
},
"details": "It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16.\n\nWorkaround:\u00a0\u003e= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.",
"id": "BIT-mongodb-2021-32040",
"modified": "2026-09-08T08:34:36.952Z",
"published": "2024-03-06T10:57:09.971Z",
"references": [
{
"type": "ADVISORY",
"url": "https://jira.mongodb.org/browse/SERVER-58203"
},
{
"type": "ADVISORY",
"url": "https://jira.mongodb.org/browse/SERVER-59299"
},
{
"type": "ADVISORY",
"url": "https://jira.mongodb.org/browse/SERVER-60218"
},
{
"type": "ADVISORY",
"url": "https://security.netapp.com/advisory/ntap-20220609-0005/"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32040"
}
],
"schema_version": "1.5.0",
"summary": "Large aggregation pipelines with a specific stage can crash mongod under default configuration"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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