CVE-2021-21978 Exploitation Attempt

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

Detects the exploitation of the VMware View Planner vulnerability described in CVE-2021-21978

MITRE ATT&CK coverage

Tactic	Techniques
Initial Access	`T1190` Exploit Public-Facing Application

Rule body

title: CVE-2021-21978 Exploitation Attempt
id: 77586a7f-7ea4-4c41-b19c-820140b84ca9
status: test
description: Detects the exploitation of the VMware View Planner vulnerability described in CVE-2021-21978
references:
    - https://twitter.com/wugeej/status/1369476795255320580
    - https://paper.seebug.org/1495/
author: Bhabesh Raj
date: 2020-03-10
modified: 2023-01-02
tags:
    - attack.initial-access
    - attack.t1190
    - cve.2021-21978
    - detection.emerging-threats
logsource:
    category: webserver
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains|all:
            - 'logupload'
            - 'logMetaData'
            - 'wsgi_log_upload.py'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    cs-method: 'POST'
    cs-uri-query|contains|all:
        - 'logupload'
        - 'logMetaData'
        - 'wsgi_log_upload.py'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`cs-method`	eq	`POST`	`field:"cs-method" kind:eq value:"POST"`
`cs-uri-query`	match	`logMetaData` `logupload` `wsgi_log_upload.py`	`field:"cs-uri-query" kind:match`

CVE-2021-21978 Exploitation Attempt

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`