Kaseya VSA 2017 ConnectWise ManagedITSync - Remote Code Execution

Exploited in the wild. Listed by CISA on 2022-05-24; known to be used by ransomware.

criticalseverity

9.8CVSS score

86.8%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

ConnectWise ManagedITSync integration through 2017 for Kaseya VSA is vulnerable to unauthenticated remote commands that allow full direct access to the Kaseya VSA database. If the ManagedIT.asmx page is available via the Kaseya VSA web interface, anyone with access to the page is able to run arbitrary SQL queries, both read and write, without authentication.In February 2019, attackers actively exploited this vulnerability in the wild to download and execute ransomware payloads on all endpoints managed by the VSA server.

Impact

Unauthenticated attackers can execute arbitrary SQL queries to access and modify the Kaseya VSA database, deploy ransomware to all managed endpoints, and potentially compromise entire customer infrastructures.

Fix

Disable or remove the ConnectWise ManagedITSync integration. If required, apply the latest security patches and restrict access to the ManagedIT.asmx endpoint.

How to confirm it

Send: GET /KaseyaCwWebService/ManagedIT.asmx
Positive when: contains_any(body, 'ManagedIT.asmx?op=', 'ExecuteSQLQuery') and status_code == 200

Run it with nuclei: nuclei -id CVE-2017-18362 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2017-18362

info:
  name: Kaseya VSA 2017 ConnectWise ManagedITSync - Remote Code Execution
  author: pussycat0x
  severity: critical
  description: |
    ConnectWise ManagedITSync integration through 2017 for Kaseya VSA is vulnerable to unauthenticated remote commands that allow full direct access to the Kaseya VSA database. If the ManagedIT.asmx page is available via the Kaseya VSA web interface, anyone with access to the page is able to run arbitrary SQL queries, both read and write, without authentication.In February 2019, attackers actively exploited this vulnerability in the wild to download and execute ransomware payloads on all endpoints managed by the VSA server.
  impact: |
    Unauthenticated attackers can execute arbitrary SQL queries to access and modify the Kaseya VSA database, deploy ransomware to all managed endpoints, and potentially compromise entire customer infrastructures.
  remediation: |
    Disable or remove the ConnectWise ManagedITSync integration. If required, apply the latest security patches and restrict access to the ManagedIT.asmx endpoint.
  reference:
    - https://github.com/kbni/owlky
    - https://www.huntress.com/blog/cve-2017-18362-arbitrary-sql-injection-in-mangeditsync-integration-ba142ff24f4d
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2017-18362
    cwe-id: CWE-89
    epss-score: 0.8682
    epss-percentile: 0.99746
    cpe: cpe:2.3:a:connectwise:manageditsync:*:*:*:*:*:kaseya_vsa:*:*
  metadata:
    vendor: connectwise
    product: manageditsync
    framework: kaseya_vsa
  tags: cve,cve2017,kaseya,connectwise,sqli,kev,vkev,vuln

http:
  - raw:
      - |
        GET /KaseyaCwWebService/ManagedIT.asmx HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - contains_any(body, 'ManagedIT.asmx?op=', 'ExecuteSQLQuery')
          - status_code == 200
        condition: and

References

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