A flaw has been found in Kamailio 5.5. The impacted element is the function rve_is_constant of the file src/core/rvalue.c. This manipulation causes null pointer dereference.
The attack needs to be launched locally. The exploit has been published and may be used. It is still unclear if this vulnerability genuinely exists.
This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Kamailio Kamailio
cpe:2.3:a:kamailio:kamailio:5.5.0:*:*:*:*:*:*:*
|
— | — |
References 9
https://shimo.im/docs/aBAYMVMB2jUP9jAj/
cna@vuldb.com
https://vuldb.com/?ctiid.329876
cna@vuldb.com
https://vuldb.com/?id.329876
cna@vuldb.com
https://vuldb.com/?submit.673240
cna@vuldb.com
https://www.openwall.com/lists/oss-security/2025/11/02/3
cna@vuldb.com
http://www.openwall.com/lists/oss-security/2025/10/27/12
af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2025/10/27/8
af854a3a-2127-422b-91ae-364da2661108
https://www.openwall.com/lists/oss-security/2025/10/27/8
af854a3a-2127-422b-91ae-364da2661108
https://shimo.im/docs/aBAYMVMB2jUP9jAj
134c704f-9b21-4f2e-91b3-4a467353bcc0