CVE-2021-20330CWE-20

Specific replication command with malformed oplog entries can crash secondaries

Medium · published December 15, 2021

CVSS v3.1
6.5
EPSS
1%
Percentile
64.8
In the wild
Unconfirmed
What it is

An attacker with basic CRUD permissions on a replicated collection can run the applyOps command with specially malformed oplog entries, resulting in a potential denial of service on secondaries. This issue affects MongoDB Server v4.0 versions prior to 4.0.27; MongoDB Server v4.2 versions prior to 4.2.16; MongoDB Server v4.4 versions prior to 4.4.9.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01080 · 64.8th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2021-12-15T12:30Z
EPSS history
Timeline
  • 15 DEC 12:30Z
    Specific replication command with malformed oplog entries can crash secondaries
    cvelistv5