---
cve: "CVE-2021-32040"
severity: "MEDIUM"
cvss: 6.5
epss: "2%"
vendor: "MongoDB Inc."
kev: false
exploited: false
published: "2022-04-12 15:15:07"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T03:39:54+02:00"
---

# CVE-2021-32040

> 6.5 MEDIUM

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 8a5c1f52a77bc92320c90ecbe5424e841874296e (Commit)
- b7530cacde8432d2f22ed506f258ff9c3b45c5e9 (Commit)

## Referenzen

- <https://jira.mongodb.org/browse/SERVER-58203>
- <https://jira.mongodb.org/browse/SERVER-59299>
- <https://jira.mongodb.org/browse/SERVER-60218>
- <https://security.netapp.com/advisory/ntap-20220609-0005/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-32040) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_