FreePBX is an open source IP PBX. From 16.0.0 until 16.0.11 and 17.0.4, the FreePBX missedcall module places the inbound Caller ID name from crafted SIP From headers into the missedcalllog INSERT in agi-bin/missedcallnotify.php without escaping or bound parameters. An unauthenticated caller can inject SQL when a monitored extension goes unanswered, corrupting the database and modifying FreePBX administrator accounts to obtain unauthorized remote access.
This issue is fixed in versions 16.0.11 and 17.0.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/FreePBX/missedcall/commit/4ada1d6b280fc246e74babc8d52f4cd150…
security-advisories@github.com
https://github.com/FreePBX/missedcall/commit/710acdf51968db507b3f9c47ce3db00684…
security-advisories@github.com
https://github.com/FreePBX/security-reporting/security/advisories/GHSA-g27h-xf3…
security-advisories@github.com