Remote code execution in FreePBX Phone Apps module
| Risk | Critical |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-45461 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | This vulnerability is being exploited in the wild. |
| Vulnerable software Subscribe |
Phone Apps Web applications / Modules and components for CMS |
| Vendor | FreePBX |
Security Bulletin
This security bulletin contains one critical risk vulnerability.
1) Input validation error
EUVDB-ID: #VU65373
Risk: Critical
CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2021-45461
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input in the Phone Apps (restapps) module for FreePBX. A remote attacker can send specially crafted input to the application and execute arbitrary code on the system.
Note, the vulnerability is being actively exploited in the wild.
Install updates from vendor's website.
Vulnerable software versionsPhone Apps: 15.0.19.87 - 16.0.18.41
External linkshttp://community.freepbx.org/t/security-issue-potential-rest-phone-apps-rce/80109
http://wiki.freepbx.org/display/FOP/2021-12-21+SECURITY%3A+Potential+Rest+Phone+Apps+RCE
http://community.freepbx.org/t/0-day-freepbx-exploit/80092
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
