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Detection rules › Sigma

CVE-2021-21972 VSphere Exploitation

Status
test
Severity
high
Log source
category webserver
Author
Bhabesh Raj
Source
github.com/SigmaHQ/sigma

Detects the exploitation of VSphere Remote Code Execution vulnerability as described in CVE-2021-21972

Known false positives

  • OVA uploads to your VSphere appliance

MITRE ATT&CK coverage

TacticTechniques
Initial Access

Rule body

title: CVE-2021-21972 VSphere Exploitation
id: 179ed852-0f9b-4009-93a7-68475910fd86
status: test
description: Detects the exploitation of VSphere Remote Code Execution vulnerability as described in CVE-2021-21972
references:
    - https://www.vmware.com/security/advisories/VMSA-2021-0002.html
    - https://f5.pm/go-59627.html
    - https://swarm.ptsecurity.com/unauth-rce-vmware
author: Bhabesh Raj
date: 2021-02-24
modified: 2023-01-02
tags:
    - attack.initial-access
    - attack.t1190
    - cve.2021-21972
    - detection.emerging-threats
logsource:
    category: webserver
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query: '/ui/vropspluginui/rest/services/uploadova'
    condition: selection
falsepositives:
    - OVA uploads to your VSphere appliance
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    cs-method: 'POST'
    cs-uri-query: '/ui/vropspluginui/rest/services/uploadova'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
cs-methodeq
  • POST
field:"cs-method" kind:eq value:"POST"
cs-uri-queryeq
  • /ui/vropspluginui/rest/services/uploadova
field:"cs-uri-query" kind:eq value:"/ui/vropspluginui/rest/services/uploadova"